This is free SIMBL plug-in for Safari.
Because of big change of Safari 5.1 and rebuilding from scratch, very limitted version currently.
for Safari 8.0 (OS X 10.10 Yosemite)
for Safari 6.0.5 (OS X 10.7 Lion and 10.8 ML / 64 bit)
also works on 6.1 Lion, 6.1 ML and 7.0, 7.1 Mavericks
for Safari 5.1.9 (Mac OS X 10.6 Snow Leopard and 10.7 Lion, tested only Snow Leopard)
Recent ChangesView Release Notes
Customize Menu Shortcut
Open System Preferences > Keyboard & Mouse > Keyboard Shortcuts. Click + button. Set application to Safari. Type correct menu title. Apply shortcut.
You can make separator in Bookmarks Bar and Bookmarks Menu.
Create folder named "-:-". It makes separator.
folder title is like "-:-label", it makes labeled separator.