return-false

@@ -38,7 +38,7 @@ Tab.prototype.show = function() {
 
     let $target = $(targetSelector);
 
-    if ($nav.hasClass('active')) {
+    if ($nav.hasClass('active') || $nav.parent().hasClass('active')) {
         return;
     }
 
@@ -78,6 +78,10 @@ $(document).on('click', '[data-trigger=tab]', function(event) {
     let $nav = $(event.target);
     let fun = '';
 
+    if ($nav.hasClass('active') || $nav.parent().hasClass('active')) {
+        return false;
+    }
+
     $.each($nav.data(), function(index) {
         if (index.substr(0, 3) === 'fun') {
             fun = index.substr(3, index.length - 3);

@@ -23,6 +23,11 @@
         width: 33.33%;
         text-align: center;
 
+        span {
+            display: inline-block;
+            width: 100%;
+        }
+
         &.active {
             color: #434241;
         }