Hello Muhammad Shoaib,
Telerik website uses SiteTabStrip control with MulitPageView. The SiteMenu is bound to dynamically created CmsSiteMap data source. You can easily override the items from the menu from RadMenu's ItemDataBound event.
Generally the level properties have only get accessor, so you cannot change the item position. In this case you can work with backend interface or populate the menu dynamically using RadMenuItem objects.
the Telerik team