I had a similar problem with ActiveAdmin 1.0beta and I wanted to publish my solution for posterity.
In the / active _admin.rb initializers, if you add "Comments" as a tag and turn them off in the menu, you can move the comments to the drop-down list or to the end of the list of the main menu.
config.show_comments_in_menu = false #.... config.namespace :admin do |admin| admin.build_menu do |menu| menu.add label: 'Dashboard', priority: 0 menu.add label: 'Revenue', priority: 3 menu.add label: 'Costs', priority: 4 menu.add label: 'Categories', priority: 5 menu.add label: 'Users & Comments', priority: 6 menu.add label: 'Comments', parent: 'Users & Comments', url: "/admin/comments" end end
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