A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type int

Filename: helpers/html_helper.php

Line Number: 164

Backtrace:

File: /data/www/www.yau-awards.com/application/helpers/html_helper.php
Line: 164
Function: _error_handler

File: /data/www/www.yau-awards.com/application/views/portal/aa/content/lists_atlas.php
Line: 56
Function: getNavCats

File: /data/www/www.yau-awards.com/application/controllers/MathmaticsContests.php
Line: 52
Function: include

File: /data/www/www.yau-awards.com/index.php
Line: 334
Function: require_once