materio-base-d7/sites/all/themes/gui/materiobasetheme/plugins/layouts/html5-basic/panels-html5-basic.tpl.php

<div class="panel-html5-basic clear-after" <?php if (!empty($css_id)) { print "id=\"$css_id\""; } ?>>
	<header class="header clear-after"><?php print $content['header']; ?></header>
	<nav class="nav clear-after"><?php print $content['nav']; ?></nav>
	<section class="section clear-after"><?php print $content['section']; ?></section>
</div>