Override the default Opigno LMS navigation menu

I recently used Opigno LMS for a client's project. It's actually a LMS distribution of Drupal. It supports WebEx meetings, Lessons, even PDF Certificates after you complete a Course. In my case though I needed Lessons but no PDF Certificates. Disabling the proper apps/modules wasn't anything out of the ordinary Drupal procedure. What was lacking though was a way to override the main menu to not display the My Achievements item.

My Achievements is enabled as long as the Opigno Quiz App (@see Lessons above) is enabled and no hook exists to override this functionality. To disable it I had to create a custom theme using the Platon theme as a base (Platon is the default theme of the Opigno LMS) and copy 3 functions of Platon's template.php file to my theme's template.php with the proper modifications to get what I wanted.

See the code below...