Magento CMS Hierarchy Stub. This is mostly useless, but just saving for myself for reference.

gistfile1.php

<div class="nav-container sidebar-nav">
    <ul class="nav nav-list">
        <?php

        $currentPage = $this->getHelper('cms/page')->getPage()->getPageId();
        $currentPageParent = '';
        $outputNodes = Array();

        $collection = Mage::getModel('enterprise_cms/hierarchy_node')->getCollection()->joinCmsPage()->setTreeOrder();
        foreach ($collection as $item) {
            if ($item->getPageId() == $currentPage)
                $currentPageParent = $item->getParentNodeId();
        }

        foreach ($collection as $item) {
            if ($item->getParentNodeId() == $currentPageParent) { // This Page Shares a Parent
                /* @var $item Enterprise_Cms_Model_Hierarchy_Node */
                $node = array(
                    'node_id'        => $item->getId(),
                    'parent_node_id' => $item->getParentNodeId(),
                    'label'          => $item->getLabel(),
                    'page_exists'    => (bool)$item->getPageExists(),
                    'page_id'        => $item->getPageId(),
                    'url'            => $item->getUrl()
                );

                if ($item->getPageId() == $currentPage)
                    $node['current'] = true;

                $outputNodes[] = $node;
            }
        }

        if ($outputNodes) {
            foreach($outputNodes as $node) {
                if ($node['current'])
                    echo '<li class="active" ><a href="' . $node['url'] . '"><span>' . $node['label'] . '</span></li>';
                else
                    echo '<li><a href="' . $node['url'] . '"><span>' . $node['label'] . '</span></li>';
            }
        }
        ?>
    </ul>
</div>