php - Adding first / last CSS classes to menus in WordPress

A better and simpler approach:

function add_first_and_last($items) { $items[1]->
classes[] = 'first-menu-item'; $items[count($items)]->
classes[] = 'last-menu-item'; return $items;
}
add_filter('wp_nav_menu_objects', 'add_first_and_last');