Wordpress Submenu

submenu.php

<?php
// use wp_list_pages to display Parent page and all child pages.
$ids = get_post_ancestors($page);
$parent = array_pop($ids);

if (empty($parent)) {
	$parent = get_the_ID();
}

$args=array(
	'child_of' => $parent
);
$pages = get_pages($args);
if ($pages) {
	$pageids = array();
	foreach ($pages as $page) {
		$pageids[]= $page->ID;
	}

	$args=array(
		'title_li' => '',
		'include' =>  $parent . ',' . implode(",", $pageids),
		'hierarchical' => '0',
		'depth' => '-1',
		'sort_column' => 'menu_order',
	);

	echo '<ul class="nav nav-pills varme nav-stacked">';
	$thelist = wp_list_pages($args);
	echo "</ul>";
}

?>