Returns a $pages collection, prepared for a foreach loop to generate a breadcrumb
<nav class="breadcrumb" role="navigation">
<ul>
<?php foreach($site->breadcrumb() as $crumb): ?>
<li>
<a href="<?php echo $crumb->url() ?>">
<?php echo html($crumb->title()) ?>
</a>
</li>
<?php endforeach ?>
</ul>
</nav>