[WP - Prefix CUSTOM Menu Items Beginning with an '/' Character with the Site Url] #wordpress #wp #core #menu #prefix #site #url #site_url #custom

wp--prefix-custom-menu-items.php

<?php
// Automatically add site url to menu CUSTOM links
// Automatically add site url to menu CUSTOM links
function jd_prefix_custom_menu_items( $items, $args ) {

    // loop through menu-objects (the links)
    foreach ($items as $key => $item) :

        // check if link begins with '/'
        if ( $item->object == 'custom' && substr($item->url, 0, 1) == '/' ) {

            // if so, prepend site_url to link
            $item->url = site_url() . $item->url;

        }

    endforeach;

    // return edited links
    return $items;

}
add_filter('wp_nav_menu_objects', 'jd_prefix_custom_menu_items', 10, 2);