irule for URL remap

Thank you kevin for the response, is the below irule will do the URI rewrite , if the browser/client hits the F5 vip with http://name.domain.com/abc/ten/spa and the backend server should receive with uri rewrite as http://spa.ten.name.domain.com/abc

On the LTM by doing a curl command it shows that uri rewrite happens , but when we checked HTTP_RESPONSE log and the backend server log, it receives the request as it is ( http://name.domain.com/abc/ten/spa )

did I miss something in the irule ? please advise

when HTTP_REQUEST {

set vip [IP::local_addr]:[TCP::local_port]
set url [HTTP::header Host][HTTP::uri] 
set URI [string tolower [HTTP::uri]]
 if {[HTTP::uri] contains "/abc/"} {
  scan $URI {/%[^/]/%[^/]/%[^/]/} a b c
  log local0. $b
  log local0. $c
  **HTTP::uri "http://$c.$b.name.domain.com/abc/"**
  log local0. [HTTP::uri] }
else{             
  scan $URI {/%[^/]/%[^/]/} a b 
  log local0. $a
  log local0. $b
  HTTP::uri "http://$b.$a.name.domain.com/"
  log local0. [HTTP::uri]
} 

}

when HTTP_RESPONSE {

set client [IP::client_addr]:[TCP::client_port]

set node [IP::server_addr]:[TCP::server_port]

set nodeResp [HTTP::status]

log local0.info "Client: $client -> VIP:$vip$url -> Node: $node with response $nodeResp"

}