UPDATE not work, PLZ Help me

[eluser]Matthieu Fauveau[/eluser]
You cannot pass variables to a controller method (except when they are used as internal functions inside the controller).

You just need to pass the $id of the db record to your view and post it via the form either via hidden field or via the action parameter. Then fetch it via $this->input->post (or ->get) and call your model function.