Creates a dropdown meny, with the current top level parent as the label in the dropdown and displaying all other top level parents.

Kirby CMS; dropdown nav with parent as label

<?php

  // current open
  $curr = $page->uid();

?>
<nav role="main">
  <ul id="nav-main" class="loop-a-stacked">
    <li class="dropdown is-active"><?php echo $pages->findOpen()->menu() ?>
      <ul class="dropdown-nav loop-a-stacked">
        <?php foreach($pages->not($curr)->not($pages->findOpen()->uid())->visible() AS $p): ?>
        <li><a href="<?php echo $p->url() ?>"><?php echo html($p->menu()) ?></a></li>
        <?php endforeach ?>
      </ul>
    </li>
  </ul>
</nav>