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		$menu->childOf('admin')->add('admin_sub_buttons')->addBulk(
			array(
				'myadmin' => array(
					'title' => 'My Admin',
					'href' => $scripturl. '?action=myadmin',
					'show' => true,
				)
			)
		);

// Grab all the menus we have
	$allMenus = Standard_Menu::context();

// Find the admin menu
	$admin_menu = $allMenus->get('Admin_Menu');

// Find the submenu you want (this get is a shortcut that will find menus at any nesting level and any position,
// if a sort of getElementById in javascript terms.
// Though if you know where your menu is you can do the "extended" version with childOf that should be slightly faster
	$submenu = $admin_menu->get('manageboards_sub');

// Add the new menu item
	$submenu->add('my_new_menu', array($txt['menu_name'], 'optional_permissions'));

// Grab all the menus we have
	$allMenus = Standard_Menu::context();

// Find the admin menu
	$admin_menu = $allMenus->get('Admin_Menu');

// Add the "visible" item (i.e.the label)
	$admin_menu->after('config')->add('your_main_item', array(
		'title' => $txt['main_item_name'],
		'permission' => array('admin_forum')
	));

// Now create your new sub-menu and add it to the main one:
	$my_item = $admin_menu->childOf('forum')->add('your_main_item');

// Finally populate it. addBulk is a shortcut (again) for add that loops through an array of menus and adds them one by one)
	$my_item->addBulk(
		array(
			'index' => array(
				'label' => $txt['admin_center'],
				'controller' => 'Admin_Controller',
				'function' => 'action_home',
				'icon' => 'transparent.png',
				'class' => 'admin_img_administration',
			),
		)
	);