hi SANJEEV

first have allok at the following link which is a prevous discussion to me has address a acase similer to urs

http://forums.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Network%20Infrastructure&topic=LAN%2C%20Switching%20and%20Routing&topicID=.ee71a04&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40%40.2cc17fa7/0#selected_message

then have a look at the following link will be helpful especially about how to make regular expretions regex

http://www.cisco.com/application/pdf/paws/98628/zone-design-guide.pdf

also, if ur ios support those commands try them not sure but try them

parameter-map type regex url1

pattern [\.yahoo\.com]

class-map type inspect http urlclass1

match req-resp header regex url1

policy-map type inspect http policy1

class type inspect http urlclass1

reset

good luck

if helpful Rate