Get Top Level Category Name

[kidsstuff]

Thanks Cobra.
I'm looking at how $breadcrumb->last() function works in tpl_index categories.php.

So I made another function inside breadcrumb.php, like:

  function first() {

    $trail_size = sizeof($this->_trail);

    return $this->_trail[$trail_size-2]['title'];

  } 

Which works fine, but now i'm stuck on how to make that number what I need. I tried:

  function first() {

    $trail_size = sizeof($this->_trail);

    return $this->_trail[$trail_size-($trail_size-1]['title'];

  } 

, which gave me this error: PHP Fatal error: Using $this when not in object context.

What else can I try?