app/assets/javascripts/your_platform/resource_nav.js.coffee
$(document).ready ->
current_tab = $('body').data('tab')
$('#resource_nav li').removeClass 'active'
$("#resource_nav li.#{current_tab}").addClass 'active'
$(document).on 'mouseenter', '#resource_nav > ul > li', ->
$(this).find('.dropdown-menu').show()