我是用template_include 挂钩：

add_filter(
    \'template_include\',
    function ($template) {
       if (is_page(\'today-deals\')) {
                global $wp_query;
                $wp_query = new WP_Query( array( \'category_name\' => date(\'Ymd\') ) );
                $template = \'category.php\';
        }


        return $template;
    }
);