<a href="javascript:;" class="<?php if($value['collapsed']=='yes') echo 'expand'; else echo 'collapse';?>" onclick="constructAjaxTree('<?php echo $value['_id']?>','<?php echo $value['code']?>');"></a>

function constructAjaxTree(aspectid,aspectcode)
        {

            if ($('.tag_input').find('.tag').length)
            {
                var elements = [];

                //iterates through each input field and pushes the name to the array
                $(".tag_input").children(".tag").each(function() {
                    var id = $(this).attr("id");
                    elements.push(id);
                });

                var geographylevel='';
                $.post('include/ajax.php', {option: 'checkavailabilitylevel', geography: elements}, function(response){
                    geographylevel=response;
                    $("#"+"div_"+aspectid).jstree({
                        "xml_data" : {
                            "ajax" : {
                                "url" : "include/ajax.php?option=constructtree",
                                "data" : function (n) {
                                return { aspectcode : aspectcode, geographylevel : geographylevel };

                                }
                            },
                            "xsl" : "nest"
                        },
                        "plugins" : [ "themes", "xml_data","ui","checkbox","cookies" ],
                     "checkbox":{"override_ui":true}
                     }).bind("check_node.jstree", function (event, data) {
                        // `data.rslt.obj` is the jquery extended node that was clicked
                        var nodeid= data.rslt.obj.attr("id");
                        addAspect(nodeid);
                    });
                    $("#"+"div_"+aspectid).bind("uncheck_node.jstree", function (event, data) {
                        // `data.rslt.obj` is the jquery extended node that was clicked
                        var nodeid=data.rslt.obj.attr("id");
                        removeAspect(nodeid);
                    });
                    $('#'+'div_'+aspectid).delegate(".jstree-open>a", "click.jstree", function(event){
                        $.jstree._reference(this).close_node(this,false,false);
                    }).delegate(".jstree-closed>a", "click.jstree", function(event){
                        $.jstree._reference(this).open_node(this,false,false);$('#')
                    });

                });


            }
            else
            {
                alert("Please Select Geography First");
            }
        }

if($_REQUEST['option']=='constructtree')
{
    $splittedaspectcode=explode("~",$_REQUEST['aspectcode']);
    $xmlDoc = new DOMDocument();
$xmlDoc->preserveWhiteSpace = false;
$xmlDoc->load("../aspect.xml");

$xpath = new DOMXPath($xmlDoc);
$query = "//item[@id='".$splittedaspectcode[0]."']";
$nodeList = $xpath->query($query);


$newDom = new DOMDocument('1.0','UTF-8');
$root = $newDom->createElement('root');
$root = $newDom->appendChild($root);


foreach ($nodeList as $domElement){
   $domNode = $newDom->importNode($domElement, true);
   $root->appendChild($domNode);
}

//$newDom->save("test.xml");

echo $newDom->saveXML();



    //constructTree($db,$_REQUEST['aspectcode'],$_REQUEST['geographylevel']);
}

<root>
<item id="3" level="1" availabilitylevel="6" >
        <content><name><![CDATA[Households]]></name></content>
        <item id="3.1" level="2" availabilitylevel="6" class="node">
            <content><name><![CDATA[All Households]]></name></content>
            <item id="3.1.1" level="3" availabilitylevel="6">
                <content><name><![CDATA[Urban]]></name></content>
            </item>
            <item id="3.1.2" level="3" availabilitylevel="6">
                <content><name><![CDATA[Rural]]></name></content>
            </item>
        </item>
</item>
</root>