Working with arrays recursively

I know you can set up nested  blocks in the
template but that only
works if you know that the array you are working with has a
predefined
number of levels.  Is there a way to set up a block so that
you can work
with the array recursively?  So no matter how many levels
the array has,
your smarty block can handle and display all the data?

thnx,
Christoph