Custom Fields For Menu Items

Introduction

Some menus may require custom fields, if this is the case for your menu then you can query the custom fields (meta fields) by using filters.

Filter Top Level Items

<?php

use WPN\Menu;

add_filter( 'wpn_menu_fields', function ( array $args, int $id ): array {
    $args['subtitle'] = get_post_meta( $id, 'my_subtitle_field' );
    
    // Advanced Custom Fields Query
    // $args['subtitle'] = get_field( 'my_subtitle_field', $id );

    return $args;
}, 10, 2 );

$menu    = new Menu( 'menu-id' );
echo $menu->as_array();

Filter Child Items

<?php

use WPN\Menu;

add_filter( 'wpn_submenu_fields', function ( array $args, int $id ): array {
    $args['subtitle'] = get_post_meta( $id, 'my_subtitle_field' );
    
    // Advanced Custom Fields Query
    // $args['subtitle'] = get_field( 'my_subtitle_field', $id );

    return $args;
}, 10, 2 );

$menu    = new Menu( 'menu-id' );
echo $menu->as_array();