How to prevent adding a 'tabs' all over again?

How to prevent adding a 'tabs' all over again?

Hello. I'm new to jquery UI.   How to prevent adding a 'tabs'  all over again?   Thanks!
           eg:
   var $tabs = $('#tabs').tabs({
   tabTemplate: '<li><a href="#{href}">#{label}</a> <span class="ui-icon ui-icon-close">Remove Tab</span></li>',
   add: function(event, ui) {    
    $tabs.tabs('select', '#' + ui.panel.id);     
   },
   ajaxOptions: {      
    error: function(xhr, status, index, anchor) {
     $(anchor.hash).html("Couldn't load this tab. We'll try to fix this as soon as possible. If this wouldn't be a demo.");
    }
   }
  });










  // actual addTab function: adds new tab using the title input from the form above
  function addTab(ClassUrl) {
   var tab_title = $tab_title_input.val() || 'Tab '+tab_counter;       
   $tabs.tabs('add', ClassUrl, tab_title);
   tab_counter++;
  }