Something

function myexchange_menu($may_cache) {
	
	$items = array();
	
	if(!$may_cache) {
		$items[] = array(
			'path'     => 'myexchange',
			'title'    => t('MyExchange Normal item'),
			'callback' => 'myexchange_all',
			'access'   => user_access('access myexchange content'),
			'type'     => MENU_NORMAL_ITEM
		);

	}
	
	return $items;
}