1. Download the treeview plugin, put it in "ext/jquery/treeview"
2. Add the code already located in the contribution in the file "tempate_top.php" between "" and " head>"
3. Replace "/includes/modules/boxes/bm_categories.php" by the download file
I have been looking at your addon:Creating a TreeView JQuery Hierarchical Navigation System. It is a very good addon.
I have a question want to ask, you said download the treeview plugin, put it in "ext/jquery/treeview" then add some code, but which php file I add with the code? I am new to OSC, please help me, thx.