3
You might have used the demo 2 in the download package. In demo2.html, you will find:
<ul id="tabs2" class="mctabs" data-options="{autoAdvance:3.5}"> ...
You just need to remove the data-options="{autoAdvance:3.5}" option. It will be:
<ul id="tabs2" class="mctabs">
Then the nested tabs will not automatically advance.