Ctrl+Shift+F9 to unlink the field. If you want to be able to update it
later, just lock it instead (Ctrl+F11). If you just want the entries not to
be hyperlinked, press Alt+F9 to display the field code, delete the \h
switch, Alt+F9 to toggle back, and F9 to update. Page numbers will still be
hyperlinked, but the entries won't be.