I’ve created a couple of custom taxonomies using the standard WordPress method: add_action( ‘init’, ‘register_taxonomy_verticals’ ); function register_taxonomy_verticals() { $labels = array( ‘name’ => _x( ‘Verticals’, ‘verticals’ ), ‘singular_name’ => _x( ‘Vertical’, ‘vertical’ ), ‘search_items’ => _x( ‘Search Verticals’, ‘verticals’ ), ‘popular_items’ => _x( ‘Popular Verticals’, ‘verticals’ ), ‘all_items’ => _x( ‘All Verticals’, ‘verticals’ ), […]