Answered add class name in relation to folder name with getressources

Hi!
I have a menu structure like this

.Folder1
--Subdfolder1
...Item1
...Item2
--Subfolder2
...Item3
...Item4
...
Folder2
--Subfolder3
...Item4

I use get ressources to get a list of all childer from one folder.
Now i want to add a class name to my output so that the subfoldername is part of my output

Like this:
<li class="subfolder1">Content of item 1 </li>
<li class="subfolder2">Content of item 3</li>

and so on... Is there an easy way on how to get the subfoldername (or the id) of my (parent)menu structure in getressources?