Redmine

It's ok :

Redmine::MenuManager.map :project_menu do |menu|
menu.push :overview, { :controller => 'projects', :action => 'show' }
menu.push :activity, { :controller => 'activities', :action => 'index' }
menu.push :roadmap, { :controller => 'versions', :action => 'index' }, :param => :project_id,
:if => Proc.new { |p| p.shared_versions.any? }
menu.push :issues, { :controller => 'issues', :action => 'index' }, :param => :project_id, :caption => :label_issue_plural
menu.push :new_issue, { :controller => 'issues', :action => 'new' }, :param => :project_id, :caption => :label_issue_new,
:html => { :accesskey => Redmine::AccessKeys.key_for(:new_issue) }
menu.push :gantt, { :controller => 'gantts', :action => 'show' }, :param => :project_id, :caption => :label_gantt
menu.push :calendar, { :controller => 'calendars', :action => 'show' }, :param => :project_id, :caption => :label_calendar
menu.push :news, { :controller => 'news', :action => 'index' }, :param => :project_id, :caption => :label_news_plural
menu.push :documents, { :controller => 'documents', :action => 'index' }, :param => :project_id, :caption => :label_document_plural
menu.push :wiki, { :controller => 'wiki', :action => 'show', :id => nil }, :param => :project_id,
:if => Proc.new { |p| p.wiki && !p.wiki.new_record? }
menu.push :boards, { :controller => 'boards', :action => 'index', :id => nil }, :param => :project_id,
:if => Proc.new { |p| p.boards.any? }, :caption => :label_board_plural
menu.push :files, { :controller => 'files', :action => 'index' }, :caption => :label_file_plural, :param => :project_id
menu.push :repository, { :controller => 'repositories', :action => 'show' },
:if => Proc.new { |p| p.repository && !p.repository.new_record? }
menu.push :settings, { :controller => 'projects', :action => 'settings' }, :last => true
end

In /lib/redmine.rb

menu.push :activity, { :controller => 'activities', :action => 'index' } ===> to comment