Help with a dynamic select list of flags for webform
It is not webform_hook_select_options_info() it is webform_hook_webform_select_options_info().
(If your module name is webform_hook)
The MODULE parts are the places, where you should enter your modul name.
Inside the foreach you need to enter valid fields from your content that listed inside the view.
Be sure that the Flag Modul is working.