dhtmlxtree view

There is anyway to add the child element in server generated xml file as the dhtmlxtree supported?

Actually the server generated only the node value xml file. i would like to add child value for those each and every node.
tree = new dhtmlXTreeObject(outId,“100%”,“100%”,0);
                tree.setImagePath("");
                tree.enableSmartXMLParsing(true);       
                tree.loadXMLString(xmlstring);
i am getting the xml file like this way… can u help me??