Adding Category title above grids

Hi,
Thanks for the plugin, I think it’s amazing. Good job!

I have a Post Grid with 3 columns. Each Column displays a category.
What I would like to do is: above each column the title of each category is shown.

example:

Category 1 title | Category 2 title | Category 3 title
[Post Grid for category 1] | [Post Grid for category 2] | [Post Grid for category 3]

Thank you for your help, and once again, great job on a great plugin.