irule to redirect the url to back pools with different ports and URI's

The answer is you can, but you need to have a way of referencing the various independent services on the client-side so that a selection can be made on the server-side.

And the server-side responses also need to be updated so that references are consistent.

AskF5 | Manual Chapter: Configuring the BIG-IP System as a Reverse Proxy Server

Also look into the rewrite profile.