We all already know how to hide files and folders on Ubuntu. Yes, simply append "." dot character at the beginning of the file or folder name. In case, you have to hide many files or folders, this method will take a long time because you have to rename them one by one to append "." (dot) to them. But don't worry, there is another way to hide them, mmm, faster way :IMHO.
Now, type the name of files or folder into ".hidden" file you've just created. Save it and open Nautilus again. See the magic!