Index: branches/version-2_12-dev/html/user_data/packages/sphone/js/category.js
===================================================================
--- branches/version-2_12-dev/html/user_data/packages/sphone/js/category.js	(revision 22091)
+++ branches/version-2_12-dev/html/user_data/packages/sphone/js/category.js	(revision 22586)
@@ -92,6 +92,7 @@
                 var linkObj = document.createElement("a");
                 linkObj.innerText = '＋';
-                tgt.childNodes[0].className="category_header plus";
-                tgt.childNodes[0].appendChild(linkObj);
+                $(tgt).children('span.category_header')
+                        .addClass('plus')
+                        .append(linkObj);
                 j++;
                 linkObj.parentNode.setAttribute('onclick', 'listopen(' + lv + ',' + num + ')');