How to skip/index/ in uri-segment

[eluser]mojitoo[/eluser]
Hey!

I want the the ability to share links like this: www.example.com/products/d32rcdsfskl, but like it is now I have to write www.example.com/products/index/d32rcdsfskl, how can I skip the index in the middle?

Code:

function index() {

  echo $this->uri->segment(2);

  if($this->uri->segment(2)) {

I want the segment to be 2 in the index controller but it has to be 3 because of the annoying index in the middle. Please help me to delete that one.