JQuery :: Click Function - Repeat Value Removed

This code after remove, repeat value removed. If not want repeat value removed, show a value norepeatvalue, what do I do?
$('span b').live('click', function () {
$('<p>' + $(this).parent().text().substr(1) + '</p>').appendTo('.list_name');
$(this).parent().remove();
});
$('.list_name p').live('click', function () {
$('<span><b>x</b>' + this.innerHTML + '</span>').insertBefore('#auto_box input');
$(this).remove();
}).live('mouseover', function () {
$('.highlight').removeClass('highlight');
$(this).addClass('highlight');
});