haha. the funny thing about that link is that it doesn't link to the tab in question.
ahem.
If you click on "options" then "selected" you'll see this:
PHP Code:
selected
Zero-based index of the tab to be selected on initialization. To set all tabs to unselected pass -1 as value.
Code examples
Initialize a tabs with the selected option specified.
$( ".selector" ).tabs({ selected: 3 });
Get or set the selected option, after init.
//getter
var selected = $( ".selector" ).tabs( "option", "selected" );
//setter
$( ".selector" ).tabs( "option", "selected", 3 );
or does that still not help?