How to check categories to a event

Hi,

I am using Jevnets for Joomla and i am trying to check events for category ids, so i can use this codition: (if $catID == "234" { do something };

I am using this code:

$catID = array($this->event->catids());

But it only returns the first level 1 category and its sublings when I print it:

print_r(array_values($catID))

Example
Event is in category 1, 1.1, 1.2, 2 and 2.1
But it only echos 1, 1.1, 1.2, not 2 and 2.1

How can this be?

Regards,
Kenneth.