irule redirect

All you'd need is:

when HTTP_REQUEST {
  if {[HTTP::host] equals "www.offer.sportography.com"} {
    HTTP::redirect "http://[string trimleft [HTTP::host] 'w.']"
  }
}

This will strip any "w" or "." characters from the left of the string. It basically eats all characters found within the single quotes, w. in this case, until it gets to the first character that isn't one of those two values.

Colin