jQuery UI Example

One
Two
Three

First tab is active by default.

$('#example > ul').tabs();

Select 3rd tab.

$('#example > ul').tabs('select', 2);

Disable 3rd tab.

$('#example > ul').tabs('disable', 2);

Enable 3rd tab.

$('#example > ul').tabs('enable', 2);

Add a new tab.

$('#example > ul').tabs('add', '#appended-tab', 'New Tab');

Remove 4th tab.

$('#example > ul').tabs('remove', 3);

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Tab Example

Magnifier Example