get method doesn't work properly

[eluser]CroNiX[/eluser]
Why not just send $id as the 3rd parameter in your form action and then grab it from the uri:egment(3)?

search/send_mail/$id

Code:

function send_mail()
{
  $id = $this->uri->segment(3);
  if ($id !== FALSE)
  {
    //...
  }
}