If I understand correctly, you want to copy the parent folder and all of its subfolders, but none of the files contained therein. There might be a simpler way, but I just threw together this Terminal command (which should also work on Linux or anywhere else with Bash):
ls -R | grep :$ | sed 's/\.\/\(.*\):$/\1/' | \
while read thisFolder; do mkdir -p "destination"/"$thisFolder"; done
It will copy the folder structure of all folders in the current directory into a folder called "destination"; you can of course change this to any path you wish, e.g. ~/Desktop/"Folder Copies" or whatever.
Take care to first "cd" into whatever directory contains the folder tree you want to duplicate, because if you run it as soon as you open the terminal, you'll wind up with a replication of your entire home folder directory structure, including the many contained within Library.