To rename the My Dashboard follow the below steps:
1.Navigate to E:\OBIEE 11G\Oracle_BI1\bifoundation\web\msgdb\l_en\messages.
2.Locate “uimessages.xml” xml file.
3.Search for My Dashboard tag.
4.Rename My Dashboard name to required name you want(my case it is:Test).
5.Restart Presentation Service.
