Collapsing Categories – wp_list_categories

Hi,

I’ve been having to work with a lot of categories lately and there is one last change I need to do, and I am having the hardest time ever trying to figure it out. I’ve tried using Collapsing Categories plugin but it doesn’t work properly and there seems to be little support for it. I can enter in the manual code for it for it to appear on a page, but the button to expand it doesn’t work.

What I need to attempt to do is making a category list that expands from a click on a button next to the category title and expands into the child categories and so on.

As expressed:

Parent
-Child
–Child
—Child

Parent
-Child
–Child
—Child

[No bumping, thank you.]