How to disable CSRF temporaly for callback controllers ?

[eluser]CappY[/eluser]
[quote author="InsiteFX" date="1299715566"]

Code:

$this->config->set_item('csrf_protection', FALSE);
$this->config->set_item('csrf_protection', TRUE);

InsiteFX[/quote]
That won't work. Input class is initiallized before Controller loading.