FAQ blocks are designed to have the filter, and the space between each FAQ and another.
You can customize the block if you want, using custom CSS by adding the following to your Custom CSS section;
Navigate to Appearance >> Theme Options >> General Settings >> Advanced
find the custom CSS area and add the following
Another way would be using another similar block (tabs and toggles) http://themes.creiden.com/circleflip/tabs-toggles/
Hope I helped, Cheers.