A PHP Error was encountered

Severity: Notice

Message: Trying to get property 'name' of non-object

Filename: models/Site_model.php

Line Number: 136

Backtrace:

File: /var/www/new/application/models/Site_model.php
Line: 136
Function: _error_handler

File: /var/www/new/application/views/site/news.php
Line: 11
Function: category_name

File: /var/www/new/application/views/site/master.php
Line: 207
Function: view

File: /var/www/new/application/libraries/Template.php
Line: 18
Function: view

File: /var/www/new/application/controllers/Site.php
Line: 44
Function: load

File: /var/www/new/index.php
Line: 315
Function: require_once