The menu class is a subclass of Component specialized in rendering menus. It have two buildin subclasses MenuButton and MenuTop

It have an internal array $elements which holds all menu titles hashed by their URL's. Instead of a menu title, an element can also be another array, indicating a submenu. Example:

$menu = new Menu();
$structure = array(
  '/index.php' => 'Main page',
  '/page1.php' => 'Item 1',
  'Submenu' => array(
    '/subpage1.php' => 'Subitem 1',
    '/subpage2.php' => 'Subitem 2'
  )
);
$menu->setElements($structure);