In WordPress how to get parent child values from menu.

WordPress Loop a custom menu to get parent and child values

<?php

$menu_name = 'main_nav';

$locations = get_nav_menu_locations();

$menu = wp_get_nav_menu_object( $locations[ $menu_name ] );

$menuitems = wp_get_nav_menu_items( $menu->term_id, array( 'order' => 'DESC' ) );

?>

<nav>

<ul class="main-nav">

<?php

$count = 0;

$submenu = false;

foreach( $menuitems as $item ):

$link = $item->url;

$title = $item->title;

// item does not have a parent so menu_item_parent equals 0 (false)

if ( !$item->menu_item_parent ):

// save this id for later comparison with sub-menu items

$parent_id = $item->ID;

?>

<li class="item">

<a href="<?php echo $link; ?>" class="title">

<?php echo $title; ?>

</a>

<?php endif; ?>

<?php if ( $parent_id == $item->menu_item_parent ): ?>

<?php if ( !$submenu ): $submenu = true; ?>

<ul class="sub-menu">

<?php endif; ?>

<li class="item">

<a href="<?php echo $link; ?>" class="title"><?php echo $title; ?></a>

</li>

<?php if ( $menuitems[ $count + 1 ]->menu_item_parent != $parent_id && $submenu ): ?>

</ul>

<?php $submenu = false; endif; ?>

<?php endif; ?>

<?php if ( $menuitems[ $count + 1 ]->menu_item_parent != $parent_id ): ?>

</li>

<?php $submenu = false; endif; ?>

<?php $count++; endforeach; ?>

</ul>

</nav>