Here are two functions to remove tabs:

$.fn.removeTab=function(tabID){
    var tab= $("#"+tabID, $(this));
    var tabContent= $(tab.attr("content"));
    tab.remove();
    tabContent.remove();
};

$.fn.removeActualTab=function(){
    var tab= $(".tab.sel", $(this));
    var tabContent= $(tab.attr("content"));
    tab.remove();
    tabContent.remove();
};

And the corresponding examples:

<button style="background:white;cursor:pointer" onclick="$('#tabset1').removeTab('a')">remove tab1</button>
<button style="background:white;cursor:pointer" onclick="$('#tabset1').removeActualTab('tabset1')">remove actual tab</button>

Bye, M.