Rewrite URL using irule from internal to External

Hi Pete,

Thanks for the suggestion ! Honestly I am new to irule configuration so I do not where to start and how to make it work but our ideal goal is to rewrite URL from internal to external website once its get redirected whatever we do, it should rewrite the URL information transparently without let the user know where they are actually getting redirected (Source URL). If you can give me some information, it would be appreciated. Thanks !