Category Accordion Menu for open catgory

1. Copy the file and put it in the appropriate folder.

2.if u have already done any changes in category.tpl make sure you have taken back up before update this file

3.if u need onclick instead of mouse over change id as
<div class="menu_list" id="secondpane"> into
<div id="firstpane" class="menu_list">

4.just check how it works