A PHP Error was encountered

Severity: Notice

Message: Undefined variable: categories

Filename: learningcenter/Blog.php

Line Number: 160

Backtrace:

File: /var/www/html/application/controllers/learningcenter/Blog.php
Line: 160
Function: _error_handler

File: /var/www/html/index.php
Line: 304
Function: require_once

Error

An Error Was Encountered

Unable to load the requested file: frontend/template/template_blog.php