To make it work in WP 4.2

A client was using this and when I updated WP it stopped working.

If you are already using it, you can make it work by changing one line in the plugin code.

Go to the plugin editor and select Hide Categories from the drop down. The file selected on the right should be ‘hide-categories/hide-categories.php’

32 lines down you should see:

if(in_array($key, $exclude)) unset($code[$key]);

Replace only the first $key with $r->term_id and save.