link_helper.rb

  def button_link(action_name, link_source)
    klass = case action_name
              when 'show'   then { "icon-eye-open" => 'btn mini green-txt'}
              when 'edit'   then { "icon-pencil"   => 'btn mini blue-txt' }
              when 'delete' then { "icon-remove"   => 'btn mini red-txt'  }
            end
    content = "#{content_tag(:i, "", class: klass.keys)} #{content_tag :b, action_name.capitalize}".html_safe
    if action_name == 'delete'
      link_to(content, link_source, class: klass.values,
              method: 'delete',
              data: { confirm: "You sure?" })
    else
      link_to(content, link_source, class: klass.values)
    end
  end