Adding categories to Chat_launch.php

Content

Hi All,

In the chat_launch.php file we have  default page controls like first name, last name.

 <rn:widget path="input/FormInput" name="Contact.Name.First" label_input="#rn:msg:FIRST_NAME_LBL#" required="true"/>
 <rn:widget path="input/FormInput" name="Contact.Name.Last" label_input="#rn:msg:LAST_NAME_LBL#" required="true"/>

 

How to add category and sub category drop down boxes to chat_launch.php?

can any one please provide me the syntax?

Version

Service cloud