Menu Tab from DB Cache Problem

I am new to drupal and I am having a look at modules.

I've created a tab menu and am loading the secondary tabs from the database. They are being cached though so when the database changes the menu stays the same.

How do I alter the following to prevent this caching problem?

	$items['milkshake'] = array(
		'title' => 'Milkshake flavors',
		'access arguments' => array('list flavors'),
		'page callback' => 'milkshake_overview',
		'type' => MENU_NORMAL_ITEM
	);
	$items['milkshake/list'] = array(
		'title' => 'List flavors',
		'access arguments' => array('list flavors'),
		'type' => MENU_DEFAULT_LOCAL_TASK,
		'weight' =>0
	);
	$items['milkshake/add'] = array(
		'title' => 'Add flavor',
		'access arguments' => array('add flavor'),
		'page callback' => 'milkshake_add',
		'type' => MENU_LOCAL_TASK,
		'weight' => 1,
	);

	$sql = "SELECT * FROM {milkshake} ORDER BY flavor ASC";
	$result = db_query(db_rewrite_sql($sql));
	while ($data = db_fetch_object($result)) {

		$items['milkshake/list/'.$data->flavor] = array(
			'title' => ucwords($data->flavor).' flavors',
			'access arguments' => array('list flavors'),
			'page callback' => 'milkshake_list',
			'page arguments' => array(2), 
			'type' => MENU_LOCAL_TASK,
		);

	}

Thanks