Routing, regular expressions and category paths...

[eluser]mddd[/eluser]
You could get the variables in the functions themselves:

Code:

function category()
{
  $path = $this->uri->segment(3) . '/' . $this->uri->segment(4);
  ...
}

function product()
{
  $product_id = $this->uri->segment(3);
  $path = $this->uri->segment(4) . '/' . $this->uri->segment(5);
  ...
}