Alter category menus

[♥zelf]

I would like to expand sub categories under parent categories without having the user click on a parent to see the subs. Basically the subs will always be displayed on every page.

 

e.g. the tree is always expanded:

 

Parent

Child

Child

Parent 2

Child

Child

 

I could not find any contribs or documentation in the forums for "always expanded menus." If anyone knows of this solution somewhere please point me to it.