rewrite url with /en/foo to /foo

[root@ve1023:Active] config  b virtual bar list
virtual bar {
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve1023:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
        if { [HTTP::uri] starts_with "/foo" } {
                HTTP::redirect "http://[HTTP::host][string map {"/foo" ""} [HTTP::uri]]"
        }
}
}
[root@ve1023:Active] config  curl -I http://www.abc.com/foo/meh/
HTTP/1.0 302 Found
Location: http://www.abc.com/meh/
Server: BigIP
Connection: Keep-Alive
Content-Length: 0