irule to switch uri based of a class file

From a data-group, you don't need to use a switch statement. Below is something I use:

ltm data-group internal url-redirect-class {
    records {
        /from1 {
            data /to1
        }
        /from2 {
            data /to2
        }
    } 
}

ltm rule redirect-rule {
    when HTTP_REQUEST {
      set path [string tolower [HTTP::path]]
      set redirect_url [class match -value -- $path equals url-redirect-class]
      if { $redirect_url ne "" } {
         HTTP::redirect $redirect_url
         return
      }
   }
}