Hi, I'm new to K2, and I find the list of categories great!
I've already programmed the issue that expand subcategories until you click on the main category.
However, I have a BIG wish - I wish that I could create a category list for a specific category.

e.g.:
products
- Equipment
- Toys
- Other things

and the result should be:
equipment
Toys
other things

It will not show "products".
I almost want to say the module: "Create a list of catefories for products"

in helper.php there is:

$root_id = (int) $params->get('root_id');

i want to change this value via module.

So there is e.g. $root_id = 114; und it makes a list of categories of all categories, that have parent = 114.
This works - but I don't know how to change this via module.
Maybe this is a simple extension in the module - but this would be so great.

please help me soon.
ive been trying this for so long now and am confused.