Show subcategories based on parent

Hi All,

I am currently trying to create a footer for my based on the categories that I have created. The problem is that I would like it to display as 3 or 4 columns depending on the number of parent categories that I have.

For example if I have the following
Parent A
– Child A1
– Child A2
Parent B
– Child B1
– Child B2

I’d like it to display as 2 columns each with 2 nodes each. The theme that I am currently using is F8 and it basically puts the ‘sidebar’ at the bottom of the page with 3 different options of left, middle and right.
I am able to manually create the category lists using something like AVH Extended Categories, however the only problem I have is that I need to manually select the parent and child categories to include. What I would like to be able to do is just select the parent and have all the child nodes included by default, or limit to the top n (eg 10) subcategories.

Does anyone know of a plugin that might allow the default inclusion of subcategories based on it’s parent?

My site is https://cyclevids.betabik.es if you would like to look.

Thanks in advance for the assistance
Dan