[jQuery] [treeview]

Hi
I've got some troubles with treeview:
http://reunion-industrial.es/reiphp/productos.php
First time it loads it Works perfectly, but when I click on one
subsubsubfamily and the page reloads, it seems the treeview loads all
the ítems at the same time. That is visible only a few ms but it makes
the site ugly…
Do you know how could I mend this???
Thank you very much