diff --git a/js/jquery.multi-select.js b/js/jquery.multi-select.js
index d71ca10..d2fe033 100644
--- a/js/jquery.multi-select.js
+++ b/js/jquery.multi-select.js
@@ -456,7 +456,7 @@
 
       ms.find('option:not(":disabled")').prop('selected', true);
       this.$selectableUl.find('.ms-elem-selectable').filter(':not(.'+this.options.disabledClass+')').addClass('ms-selected').hide();
-      this.$selectionUl.find('.ms-optgroup-label').show();
+      //this.$selectionUl.find('.ms-optgroup-label').show(); 
       this.$selectableUl.find('.ms-optgroup-label').hide();
       this.$selectionUl.find('.ms-elem-selection').filter(':not(.'+this.options.disabledClass+')').addClass('ms-selected').show();
       this.$selectionUl.focus();