Hi,

Yes, if you create a new function with that follow feature, it will not affect the whole Easyblog system.

The category view file is located at JoomlaFolder\components\com_easyblog\views\categories\view.html.php

You can create a new function at Easyblog helper file -> JoomlaFolder\components\com_easyblog\helpers\helper.php

Access that function you can using this similar code :

EasyBlogHelper::followFunctionName();

Hope this help.