where category is the slug of the filter and plugins is the taxonomy (in this case, a category) term.
It is possible to write PHP to have the links to categories in the above format in Oxygen's Easy Posts but we wanted to create automatic redirects so that existing links in the format of
https://wpdevdesign.com/category/plugins/
will get redirected to the corresponding WPGB link format URL.
This members-only tutorial provides the working regex redirect for this and for tag archives while ensuring that %2F does not get added at the end of redirected URLs: