I want to copy the contents of an unzipped folder,
wordpress/, to another existing folder.
cp -R wordpress/*.* /my/folder
but the sub-folders in
wordpress/ didn't get copied over.
If you have hidden files/directories then you'll need to run the following from inside the source directory
that will copy all files and folders including ones starting with a . (dot).
If you don't have hidden files/directories that need to be copied then wliao's answer will do.
(edited for clarity)