Show Ray Listing recursive witout files

I need a display in a text file the contents of all directorys of a ftp server, the ftp server have sub-folders with files, i don't need list this files.

Server AAA
FOLDER A
sub-folder A1
sub-folder A2
sub-folder A3
FOLDER B
sub-folder B1
sub-folder B2
sub-folder B3
....

If i put a recursive flag, show folders with files...

Thank's a lot !!!!!

Please help me !!!

I don't think that this is possible.