Hi Priyank,
I'll advise you to first search your requirement on scn if not able to get any clue then post it, otherwise your post will be locked. Please read The SCN Rules of Engagement.
You can check below links;
Crm Navigation Bar customization
How to create custom work center page
Add your custom BSP component as a link in a Work Center - CRM - SCN Wiki
Regards,
Kamfrk.