A PHP Error was encountered

Severity: Notice

Message: Undefined index: class

Filename: controllers/Category.php

Line Number: 84

Backtrace:

File: /usr/home/byu5617160001/htdocs/application/controllers/Category.php
Line: 84
Function: _error_handler

File: /usr/home/byu5617160001/htdocs/application/controllers/Category.php
Line: 31
Function: tree_list

File: /usr/home/byu5617160001/htdocs/index.php
Line: 326
Function: require_once