Navigation - Active link class

[mvlcek]

where are the files / lines to change the code, in which the navigation adds the 'class="current"' attribute to the active navigationpoint? I would like to cut it out there and paste it in the <a href=""> Attribute for the navigationpoints!

Why would you want to do that?
Any CSS rule a.current can also be defined as li.current a.
Changing code in GetSimple or a plugin is not a good idea as it makes updating to a new version much harder.

And if you still want to do it, just search for get_navigation or current in the /admin folder and below.