I think you can chage the titles to a space by adding the following lines to your layer:

set text_view_network = " ";
set text_view_memories = " ";
set text_view_tags = " ";

There's probably a way to do it with CSS as well, but I'm not good with converted versions of Flexible Squares. Somebody else might be able to help you better. My suggested code needs to be in your layer, not in the custom CSS.