2018-02-01, 05:21:25
Instead of editing GS core files, I suggest you copy the whole
get_navigation
function to your theme's functions.php file (create it if it doesn't exist) with a different name (e.g. "my_get_navigation"), make the "uk-active" change there, and use this new function in your template. This way you will be able to upgrade GS without having to edit theme-functions.php again.