Function to know if a menu item has children

func_menu_item_has_children.php

<?php
function menu_item_has_children($id){
	global $wpdb;
	$myrows = $wpdb->get_results( "SELECT * FROM `wp_postmeta` WHERE `meta_key` LIKE '_menu_item_menu_item_parent' AND `meta_value` LIKE ".$id );
	
	if(empty($myrows)) : 
		return false;
	else : 
		return true;
	endif;
}