Just a trick I just figured out – I installed a sitemap plugin for wordpress and wanted to drop the rendered sitemap into my 404 page.  The short code for the plug was [ slick-sitemap ].  So, in my 404.php page within my theme directory, I just added this :

<?php echo  apply_filters(‘the_content’,'[slick-sitemap]’);?>

that’s, well, slick 🙂