HABTM and multiple level

I need to tag some "record", say picture, with a tree-like model.

I have a pictures model and a category model.

The category model has 3 fields connected as a tree:

cat1
cat2
cat3

The tree structure could be:

art
painting
minimalism
expressionism
...
sculpture
nature
trees
flowers
roses
...

When I enter a new "picture" I'd like to be able to select many "tags"
from category, say, art-painting-expressionism and nature-trees.
And I'd like to be able to select each category tag using cascading
select boxes.

Is there a natural way to bake this in cakephp?

Thank you
maxx
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