Hi Cobra Eyes,
There is currently no way to do this out the box. The reason is Simple Links makes no assumptions about what a theme has and supplies no templates. To be able to link to a category of links would require the theme to have a taxonomy template that was setup to render the links properly and link them to the set locations. This plugin uses shortcodes and widgets to generate outputs so there is no templating support.
That being said, it is theoretically possible to build this if you create a template for simple links categories then filter the simple links category args to make WP support category pages. It will take some creative structuring but it should work.
Then if you filter get_terms you can turn the names of the categories into links.
I realize it seems like a complicated process but possible.
Cheers.
