A PHP Error was encountered

Severity: Notice

Message: Undefined variable: cat_name

Filename: controllers/Demo.php

Line Number: 131

Backtrace:

File: /home/americanhairline/public_html/application/controllers/Demo.php
Line: 131
Function: _error_handler

File: /home/americanhairline/public_html/index.php
Line: 315
Function: require_once