wp_xmlrpc_server::mw_getCategories( array $args )

	public function mw_getCategories( $args ) {
		$this->escape( $args );

		$username = $args[1];
		$password = $args[2];

		if ( !$user = $this->login($username, $password) )
			return $this->error;

		if ( !current_user_can( 'edit_posts' ) )
			return new IXR_Error( 401, __( 'Sorry, you must be able to edit posts on this site in order to view categories.' ) );

		/** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
		do_action( 'xmlrpc_call', 'metaWeblog.getCategories' );

		$categories_struct = array();

		if ( $cats = get_categories(array('get' => 'all')) ) {
			foreach ( $cats as $cat ) {
				$struct = array();
				$struct['categoryId'] = $cat->term_id;
				$struct['parentId'] = $cat->parent;
				$struct['description'] = $cat->name;
				$struct['categoryDescription'] = $cat->description;
				$struct['categoryName'] = $cat->name;
				$struct['htmlUrl'] = esc_html(get_category_link($cat->term_id));
				$struct['rssUrl'] = esc_html(get_category_feed_link($cat->term_id, 'rss2'));

				$categories_struct[] = $struct;
			}
		}

		return $categories_struct;
	}