where should I position my extended controllers?

[eluser]CroNiX[/eluser]
You misunderstand. Only MY_Controller (which extends CI_Controller) goes in /application/core.

The rest of your controllers just go in /application/controllers like normal, but they extend MY_Controller instead of the normal CI_Controller. You can't direcly access anything in /application or /system from the URL. Those are protected. You just use the regular CI urls.

Like

Code:

redirect('controller/method');
echo anchor('controller/method', 'My Anchor');
//etc.