Submenu items in secondary menu

Featured in: Building a Dynamic Secondary Menu

<?php
/**
* Submenu items in secondary menu
*
* Assign the same menu to 'header' and 'secondary'.
* This will display the current section's subpages in 'secondary'
*
* @author Bill Erickson
* @link http://www.billerickson.net/building-dynamic-secondary-menu
*
* @param array $menu_items, menu items in this menu
* @param array $args, arguments passed to wp_nav_menu()
* @return array $menu_items
*
*/
function be_submenu_items_in_secondary( $menu_items, $args ) {
// Only run on 'secondary' menu location.
if( 'secondary' !== $args->theme_location )
return $menu_items;
// Find active section
$active_section = false;
foreach( $menu_items as $menu_item ) {
if( ! $menu_item->menu_item_parent && array_intersect( array( 'current-menu-item', 'current-menu-ancestor' ), $menu_item->classes ) )
$active_section = $menu_item->ID;
}
if( ! $active_section )
return false;
// Gather all menu items in this section
$sub_menu = array();
$section_ids = array( $active_section );
foreach( $menu_items as $menu_item ) {
if( in_array( $menu_item->menu_item_parent, $section_ids ) ) {
$sub_menu[] = $menu_item;
$section_ids[] = $menu_item->ID;
}
}
return $sub_menu;
}
add_filter( 'wp_nav_menu_objects', 'be_submenu_items_in_secondary', 10, 2 );
view raw functions.php hosted with ❤ by GitHub

Bill Erickson

Bill Erickson is a freelance WordPress developer and a contributing developer to the Genesis framework. For the past 14 years he has worked with attorneys, publishers, corporations, and non-profits, building custom websites tailored to their needs and goals.

Ready to upgrade your website?

I build custom WordPress websites that look great and are easy to manage.

Let's Talk