Bootstrap Tabs works as expected... Bootstrap Drop Down Tabs breaks javascript

Here is a working code on Bootply that i'm trying to implement: http://www.bootply.com/POoImfPTWH

The code was built from the Bootstrap documentation here: http://getbootstrap.com/javascript/#tabs

Here is an image of the documentation



The tabs WITHOUT dropdown tab works as expected in any joomla article. However, when I add the drop down tab, everything breaks. I can see the tab but the javascipt doesn't work - i can't switch between tabs.

Here is the code is below

Anybody has a suggestion for this fix?? Any help will be much appreciated!

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$(function () {

    $('#myTab a:last').tab('show')

  })