Orbit/app/views/admin/page_parts/_module_widget.html.erb

<span id='module_app_list'>
	<%= f.select :module_app, options_from_collection_for_select(@module_apps, :id, :title, :selected => @module_app.id), {}, {:rel => admin_page_parts_path} %>
</span>

<span id='widget_list'>
	<%= f.select :widget_path, @module_app.widgets.collect{|widget| [widget.humanize, widget]}, :selected => @part.widget_path %>
</span>

:

<span id="widget_category">
	<%= render 'widget_categories' %>
</span>
or
<span id="widget_tag">
	<%= render 'widget_tags' %>
</span>