WordPress - Filter [ wp_nav_menu_objects ] - Modify WordPress nav menu objects

wp-filter-modify_nav_menu_objects

/**
 *  Modify WordPress nav menu objects
 *
 * @param array $menu_items
 * @return array
 */
function shgist_nav_menu_item_classes( $menu_items ) {

    foreach ( (array) $menu_items as $key => $menu_item ) {
        // Work on menu item objects
    }

    return $menu_items;
}
add_filter( 'wp_nav_menu_objects', 'shgist_nav_menu_item_classes', 2 );