Hi Venu,
Try searching this forum for mod_rewrite to find a few examples. If you try something and get stuck, add logging to the iRule (
Click here), reply here with what you're testing, what the client sees and logs from /var/log/ltm.
mod_rewrite to iRule assistance
http://devcentral.f5.com/Default.aspx?tabid=53&forumid=5&tpage=1&view=topic&postid=62642
rewrite rule
http://devcentral.f5.com/Default.aspx?tabid=53&forumid=5&tpage=1&view=topic&postid=29745
Performaing complex Apache like rewrites
http://devcentral.f5.com/Default.aspx?tabid=53&forumid=5&tpage=1&view=topic&postid=19947
Aaron