Render url in Datatables

$(document).ready(function() {
    var RestUrl = "../_api/Web/Lists/GetByTitle('BrandItems')/items";
    $.ajax({
        url: RestUrl,
        method: "GET",
        headers: {
            "accept": "application/json;odata=verbose",
        },
        success: function(data) {
            if (data.d.results.length > 0) {
                //construct HTML Table from the JSON Data
                $('#DatatableGrid').append(GenerateTableFromJson(data.d.results));
                //Bind the HTML data with Jquery DataTable
                var oTable = $('#EmployeeTable').dataTable({
                    "iDisplayLength": 10,
                    "aLengthMenu": [
                        [5, 10, 30, 50],
                        [5, 10, 30, 50]
                    ],
                    "sPaginationType": "full_numbers"
                });
            } else {
                $('#DatatableGrid').append("<span>No Employee Details Found.</span>");
            }
        },
        error: function(data) {
            $('#DatatableGrid').append("<span>Error Retreiving Employee Details. Error : " + JSON.stringify(data) + "</span>");
        }
    });

    function GenerateTableFromJson(objArray) {
        var tableContent = '<table id="EmployeeTable" style="width:100%"><thead><tr><td>File Name</td>' + '<td>File Type</td>' + '<td>Organization</td>' + '<td>Download</td>' + '</tr></thead><tbody>';
        for (var i = 0; i < objArray.length; i++) {
            tableContent += '<tr>';
            tableContent += '<td>' + objArray[i].Display_x0020_Name + '</td>';
            tableContent += '<td>' + objArray[i].FileType0 + '</td>';
            tableContent += '<td>' + objArray[i].Organization + '</td>';
            tableContent += '<td>' + objArray[i].DL_Link + '</td>';
            tableContent += '</tr>';
        }
        return tableContent;
    }
});

{
                                "mData": "ID",
                                "render": function(mData, type, row, meta) {
                                        var returnText = "";
                                        var url = _spPageContextInfo.webAbsoluteUrl + "/Lists/ProjectDetails/DispForm.aspx?ID=" + mData;
                                        returnText = "<a target='_blank' href=" + url + ">" + mData + "</a>";
                                        return returnText;
                                }

                        }