iRule redirect

You can try something like this:

when HTTP_REQUEST { 
    if { ([string tolower [HTTP::host]] starts_with "ensemble-sp1") && ([string tolower [HTTP::uri]] contains "/sites/PMIS/" ) } { 
         the following command will find the string /sites/PMIS/ and will return all characters after 
         that string until it hits either an & or the end of the string,
        HTTP::redirect "http://cindy-uat/[findstr [HTTP::uri] "/sites/PMIS/" 12 &]"
    }
}

I haven't actually tested this, but it should be a good starting point for you.