i don't know if this will work on yours, but try it.
go to your cms addon folder then
config>addon.php
you will see there like this(edit the ones in bold)
// - Menu and sub-menu items. (displayed on left nav & content sub menu)
'MenuItems' => array(
'Main Menu' => array(
// Sample items for pages function.
'Downloads' => array('module' => 'pages','action'=>'content&path=downloads'),
'Server Info' => array('module' => 'pages','action'=>'content&path=info'),
'Staffs' => array('module' => 'pages','action'=>'content&path=staff'),