Hidden files won't stay hidden in Ubuntu 14.04 LTS
Whenever I open my files, my hidden files show up. I can hide them but when I open up my files again, they're showing again. How do I make the hidden files invisible permanently?
You have set the option Show hidden and backup files in the Edit -> Prefererences. Just clear the checkbox and the hidden files will stay hidden after you re-open the file manager.
Or if that solution doesn't work because you are affected by bug 1171852, then try this:
https://bugs.launchpad.net/ubuntu-gnome/+bug/1171852/comments/14
It was the only of many options that worked for me without installing additional tools (like dconf)