Displaying data in tree structure php sql
<p>My website(php) has some categories and corresponding sub categories.</p>

<p>I want to display them in tree structure.</p>

<p>First of all the categories should be displayed with a plus sign , when someone clicks the plus sign , below categories should slide down and corresponding sub categories should display.</p>

<p>This is very common thin i found on many web sites but unable to find how to do it.</p>

<p>pls suggest how to implement this structure.</p>

<p>Thanks.</p>
