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

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

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

		$cats = get_categories( array( 'get' => 'all' ) );
		if ( $cats ) {
			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;
	}