if ( ! function_exists( 'tax_themes' ) ) { // Register Custom Taxonomy function tax_themes() { $labels = array( 'name' => 'Themes', 'singular_name' => 'Theme', 'menu_name' => 'Research Themes', 'all_items' => 'All Themes', 'parent_item' => 'Parent Theme', 'parent_item_colon' => 'Parent Theme:', 'new_item_name' => 'New Theme Name', 'add_new_item' => 'Add New Theme', 'edit_item' => 'Edit Theme', 'update_item' => 'Update Theme', 'view_item' => 'View Themes', 'separate_items_with_commas' => 'Separate items with commas', 'add_or_remove_items' => 'Add or remove themes', 'choose_from_most_used' => 'Choose from the most used', 'popular_items' => 'Popular Themes', 'search_items' => 'Search Themes', 'not_found' => 'Not Found', 'no_terms' => 'No Themes', 'items_list' => 'Theme list', 'items_list_navigation' => 'Themes list navigation', ); $args = array( 'labels' => $labels, 'hierarchical' => true, 'public' => true, 'show_ui' => true, 'show_admin_column' => true, 'show_in_nav_menus' => true, 'show_tagcloud' => true, 'show_in_rest' => true, ); register_taxonomy( 'theme', array( 'research' ), $args ); } add_action( 'init', 'tax_themes', 0 ); }