<article id="page_custom" class="page_<?php echo $_GET['page_id']; ?>">
<?php if ($tpl['custom_page']['filename']) : ?>
<?php include_once($tpl['custom_page']['filename']); ?>
<?php else : ?>
<?php echo $tpl['format_text']($tpl['custom_page']['content']); ?>
<?php endif; ?>

</article>
