当你register_taxonomy 只需将post\\u类型的数组添加到$object_type 参数

来自WordPress codex：

（数组/字符串）（必需）分类法对象的对象类型的名称。对象类型可以是内置对象（见下文）或任何可以注册的自定义帖子类型。

因此，您可以在运行后添加一个post\\u类型数组register_taxonomy 在本例中，其名称为“流派”。请参见下面的代码：

//hook into the init action and call create_book_taxonomies when it fires
add_action( \'init\', \'create_book_taxonomies\', 0 );

//create genres for the post_types post and page
function create_book_taxonomies() {

  $labels = array(
    \'name\' => _x( \'Genres\', \'taxonomy general name\' ),
    \'singular_name\' => _x( \'Genre\', \'taxonomy singular name\' ),
    \'search_items\' =>  __( \'Search Genres\' ),
    \'all_items\' => __( \'All Genres\' ),
    \'parent_item\' => __( \'Parent Genre\' ),
    \'parent_item_colon\' => __( \'Parent Genre:\' ),
    \'edit_item\' => __( \'Edit Genre\' ), 
    \'update_item\' => __( \'Update Genre\' ),
    \'add_new_item\' => __( \'Add New Genre\' ),
    \'new_item_name\' => __( \'New Genre Name\' ),
    \'menu_name\' => __( \'Genre\' ),
  );    

  register_taxonomy(
    \'genre\',
    array(\'post\', \'page\'), // add your post_types here
    array(
        \'hierarchical\' => false,
        \'labels\' => $labels,
        \'show_ui\' => true,
        \'show_admin_column\' => true,
        \'query_var\' => true,
        \'rewrite\' => array( \'slug\' => \'genre\' ),
  ));
}