QUESTION How to hide elements in core template files?

[cubicalweb]

I'm new to GetSimple and really like what I see. Currently I'm just getting a feel for this CMS.

As to my question, I've installed the plugin "Multi User" and would like to hide some page elements if the user is not an admin. The best way for me to explain is to show an example... see attached screenshot.

   

How can I do this without changing the core files?

Brian