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php // fetch the categories with the parent being the current cat $sub_cats = get_terms('category', array( 'parent' => get_queried_object_id() )); if(! …

First you need to get all the categories that don't have parents (top-level categories). We're going to use get_terms for this. … $cats || is_wp_error( $cats ) ) return; With that in place we can start by outputing a container div, then starting a foreach loop to loop through all the categories. …

You can use a loop counter to accomplish this. Set up a counter variable before you loop, check to see if it divided by 2 returns a 0 remainder (in this case) and adjust the class accordingly. Increm …

Nav Menus are actually taxonomies -- eg. they are registered with register_taxonomy and get used to associated menu items (which are, of course, a custom post type!). Slugs, which is what you're tryi …

You're using an old version of WordPress. Upgrade to 3.5 and you will no longer see that error. Here's the function declaration for get_post in WP 3.4: function &get_post(&$post, $output = OBJECT, $ …

get_the_category_list runs it output through the filter the_category. You could hook in there and change whatever you like. Something like this should work (untested): <?php add_filter('the_categor …

Skip to that if you don't need a way to associate categories with users. So first off, let's wrap everything up in a class. … Our field will grab all the current categories and put them in a drop down menu. We'll also output a nonce field that we'll check later on saving the user. <? …

edit_user_profile fires when they edit another's profile -- this is how your admin user will go in an edit user's categories. <? … php /** * Get the categories available for use with this plugin. …

I don't think you need to get the list of authors in a given category or use a bunch of individual WP_Query's, you just need to order posts by author and check to see when the author changes. Two par …

Keep track of the return value of wp_insert_term and use it to build your structure. A successful return value will be an array with a term_id key that you can pass into wp_insert_term's $args array a …

To disable categories, tags, author and date archives: <? …

What you're looking for is an endpoint. There are already several of these built in: /feed/some-feed/ for feeds or /trackback/ on posts. Those are both endpoints. Fortunately, WordPress provides a …

You can do this with a rewrite rule from within WordPress. Take a look at the documentation for add_rewrite_rule. Something like this: <?php add_action('init', 'wpse65855_rewrite'); function wpse65 …

You can use pre_get_posts to hook in and change the query. The argument passed to pre_get_posts is the query object. It fires for every query, so you need to check some things first. Quick example (n …

There are a few ways you can do this. The simplest is to just get everything: posts and terms, then use some array_filter magic to group things. Simple example (that will only work with PHP 5.3+): < …