Need to create irule that can redirect a port to another port

if we bypass the F5 completely then we have to specify a port "; because that's what the app is listening for. Once we put it in production, clients will connect via the VIP on standard http port number, then the F5 will forward it to the nodes in the pool on port 9080....I tried to get the developers to disable that feature in which the application responds back with a port in the URL causing the clients to make a request on that specific port. They said that's the behavior of the application. I will search around to see how to strip the port number from the response but maintain the URI and hostname intact.