Collect data send by BIG-IP to client in iRule

Ah, well then you still need a layered LTM VIP in front of your View APM VIP. You'd use an iRule construct similar to this on that "external" VIP:

when CLIENT_ACCEPTED {        
     point to the internal VIP by name 
    virtual my_internal_view_vip
}    
when SERVER_CONNECTED {    
    TCP::collect
}    
when SERVER_DATA{    
     do whatever you need to do here to replace content coming from the internal VIP (or CS)        

    TCP::release
}