WP ACF Menu Field

acf-menu-field.php

function subnavigation_field( $field ) {

  $field['choices'] = [];

  $menus = get_registered_nav_menus();

  foreach ($menus as $menu_slug => $menu_name) {
    switch ($menu_slug) {
      case 'main_nav':
      case 'utility_nav':
      case 'footer_nav':
        break;
      default:
        $field['choices'][$menu_slug] = $menu_name;
        break;
    }
  }

  return $field;

}

add_filter('acf/load_field/name=subnavigation', 'subnavigation_field');