Each of these snippets (with one noted exception) can be added to functions.php of your main blog theme or you can create a simple plugin.

Swap the BuddyBar for the Admin Bar

If you somehow are still using the buddy bar, try one of the following methods. (You may also need to adjust your CSS slightly to accommodate the differences between the two admin bars.)

Here is the preferred BuddyPress method, which is simply added to wp-config.php:

/*
** Add the following to wp-config.php
** Removes BP admin bar and replaces it with the WP admin bar
*/
define( ‘BP_USE_WP_ADMIN_BAR’, true );

If for some reason you find that the above method does not work, you may try adding the following to functions.php

<?php
/*
** The following removes BP admin bar and replaces it with the WP admin bar
*/
 
function remove_bp_adminbar(){
     remove_action( 'wp_footer', 'bp_core_admin_bar', 8 );
     remove_action( 'admin_footer', 'bp_core_admin_bar');
     show_admin_bar(true);
}
add_action('after_setup_theme','remove_bp_adminbar');
?>

Remove something from the Admin Bar

To remove a menu item, you just need to know its HTML div id. This example removes the WordPress logo and menu. See remove_node().

<?php
/*
** The following removes the WordPress menu and logo
** wp-admin-bar-wp-logo is the div id in the menu HTML but we just use wp-logo 
** see http://codex.wordpress.org/Function_Reference/remove_node
*/
 
function admin_bar_remove_this(){
     global $wp_admin_bar;
     $wp_admin_bar->remove_node('wp-logo');
     }
     add_action('wp_before_admin_bar_render','admin_bar_remove_this');
?>

Adding something to the Admin Bar

Similarly, you can add a new menu item to an existing HTML div id. Here we are adding a link to create a new category within the +New menu. See add_node().

<?php
/*
** The following adds a link item to create a new "Category" within the "+New" menu
** wp-admin-bar-new-content is the div id in the menu HTML but we just use new-content 
** see http://codex.wordpress.org/Function_Reference/add_node
*/
 
function admin_bar_add_this(){
     global $wp_admin_bar;
     $newcat=get_site_url( BP_ROOT_BLOG ).'/wp-admin/edit-tags.php?taxonomy=category';
     $wp_admin_bar->add_node( array(
          'parent' => 'new-content',
          'title' => 'Category',
          'href' => $newcat) );
     }
add_action('wp_before_admin_bar_render','admin_bar_add_this');
?>

Make it Easier for Network Users to Create New Blogs

The BuddyPress dev team has added Notifications and some other BP-specific features to the admin bar, but the link to “Create a new site” is still missing as of v. 1.5.3 (UPDATE: actually, this would be a WP issue, not BP; track this issue here). If you have a very active community, especially one that routinely creates new sites (e.g. a university course blog network), they will notice this absence. To add another complication, BuddyPress redirects wp-signup.php to the network homepage, meaning the default WordPress Network mode method for creating a new site is broken (UPDATE: track this issue here). Luckily both of these are easy to fix.

<?php
/*
** The following adds a link to "Create a new site" under "My Sites" menu
*/
function admin_bar_create_blog_link(){
     global $wp_admin_bar;
     $create=get_site_url( BP_ROOT_BLOG ).'/blogs/create/';
     $wp_admin_bar->add_node( array(
          'parent' => 'my-sites',
          'title' => 'Create a new site',
          'href' => $create) );
}
add_action('wp_before_admin_bar_render','admin_bar_create_blog_link');
 
/*
** The following fixes the dashboard link for "Create a new site"
** By default, WordPress sends the user to wp-signup.php to create a site
** But wp-signup.php is redirected to the network homepage by BuddyPress as of 3.1+ and 1.5.3+ respectively
** This just filters that core behavior to use the BuddyPress link instead
*/
add_filter('wp_signup_location', 'bp_blog_creation_link');
function bp_blog_creation_link($old) {
     if (function_exists('bp_include'))
     return get_site_url( BP_ROOT_BLOG ).'/blogs/create/';
}
?>

Feel free to make additional suggestions in the comments.

I recently set up an installation of WordPress MultiUser (WPmu) + BuddyPress for the History Department where I work. We have a number of different user groups on the site, including Courses, Workshops, and Projects. Eventually we will also have Personal sites (for students, staff, and faculty in the dept.) and perhaps some small organizations and campus groups. Right now the site is small, so it would be reasonable to manually create and maintain a topical directory. As the site grows, however, this could become a burden to say the least. Nobody likes to do that kind of crap – not even graduate assistants. So with the help of an outdated plug-in and a couple of tiny hacks, I easily created a directory of Blogs by Topic so I never need to hand code the directory. Read on to find out how.

To begin with, I’m using Deanna Schneider’s very handy Blog Topics For WPMU. Basically, Blog Topics creates a field in the relevant Settings, Registration and BuddyPress areas in which your users choose from a drop-down of admin-defined topics. They cannot create new topics, they must use the ones you set, so keep that in mind. The Site Admin can manually set the Topic for any blog at any time; this might be necessary if you already have a handful of blogs on your site (or you could demand that your users do it themselves because this is all about being lazy). Some users might misfile their site in the wrong category, but you can always go in and edit any blog’s Topic; they probably won’t even notice.

You might be wondering why I would write a tutorial for installing a plug-in. Well, I’m not sure if the plug-in code has some deprecated elements or if it just doesn’t play nice with the new BuddyPress theme structure, but it’s actually a bit more complicated than just installing the plug-in. For whatever reason, the documentation for this plug-in is pretty weak and some of it just doesn’t seem to work without some tweaks. That’s where I come in to sum up my hours of frustration with what now seems like an obvious process.

Here’s the drill…

1. Install the plug-in in your wp-content/plugins folder and activate it on your parent site. The plug-in comes with a nice little widget for your MU child sites, but it won’t help you here so consider it optional.
2. Inside the wp-content/plugins/blog-topics directory, you will find the file cets_blog_topics_page.php (a WordPress page template). Copy this file to the root of your site’s parent theme file. If you are using BuddyPress 1.1, that means themes/bp-sn-parent.
3. Now, take that file and mess it all up according to the instructions below. Unfortunately, in the plug-in’s current state (v. 0.3.2), the default file just doesn’t work, but after digging around in the code, I found some functions that work quite nicely and can be easily integrated into your BuddyPress directories. Again, you will need to save this to the root of your theme.
4. Create a page called Blog Topics Directory (or whatever) and apply the Blog Topics Page template you just created.

< ?php
/*
Template Name: Blog Topics Page
*/
?>
< ?php get_header(); ?>
 
	<div id="content" class="narrowcolumn">
 
		< ?php do_action( 'bp_before_directory_blogs_content' ) ?>
 
		<div class="page" id="blog-page">
 
			< ?php if (have_posts()) : while (have_posts()) : the_post(); ?>
 
				<h2 class="pagetitle">< ?php the_title(); ?></h2>
 
                                <!--using anchors for long lists, or you could use something fancier to browse topics-->
 
					<ul id="topic-list">
					<li><a href="#topic1">Topic 1</a></li>
					<li><a href="#topic2">Topic 2</a></li>	
					<li><a href="#topic3">Topic 3</a></li>	
					<li><a href="#topic4">Topic 4</a></li>	
					<li><a href="#topic5">Topic 5</a></li>	
					</ul>					
 
<!--add the numeric Topic ID according to the models below-->	
 
<!--topic1-->
<a name="topic1"></a>
<h2 class="pagetitle">< ?php echo cets_get_topic_name('1') ?> Blogs</h2>  
< ?php echo cets_get_blogs_from_topic_id_html('1'); ?>
 
<!--topic2-->
<a name="topic2"></a>
<h2 class="pagetitle">< ?php echo cets_get_topic_name('2') ?> Blogs</h2>  
< ?php echo cets_get_blogs_from_topic_id_html('2'); ?>
 
<!--topic3-->
<a name="topic3"></a>
<h2 class="pagetitle">< ?php echo cets_get_topic_name('3') ?> Blogs</h2>  
< ?php echo cets_get_blogs_from_topic_id_html('3'); ?>
 
<!--topic4-->
<a name="topic4"></a>
<h2 class="pagetitle">< ?php echo cets_get_topic_name('4') ?> Blogs</h2>  
< ?php echo cets_get_blogs_from_topic_id_html('4'); ?>
 
<!--topic5-->
<a name="topic5"></a>
<h2 class="pagetitle">< ?php echo cets_get_topic_name('5') ?> Blogs</h2>  
< ?php echo cets_get_blogs_from_topic_id_html('5'); ?>
 
 
 
 
			< ?php endwhile; endif; ?>
 
		</div>
 
		< ?php do_action( 'bp_after_directory_blogs_content' ) ?>
 
	</div>
 
< ?php get_sidebar(); ?>
 
< ?php get_footer(); ?>

You could probably find any number of ways to integrate this into your theme’s Blog Directory. Although I might eventually change it, right now, I’ve just added a link to the Blog Directory sidebar which users can… use… to Browse Blogs by Topic. If it helps, here’s a link to the site where this code is being used. Again, it needs some tweaking but this should get you started. Hope this quick fix has helped.

If you’re wondering why this post has a giant image of Brak (among other notable “buddies”) at the top, or if you just need a break from all this BuddyPress nonsense, you might need to listen to this…

Brak sings Yeah Buddy (via brakbuddy.ytmnd.com)