We have added grid option menubar which if set to true will enable custom menuaction at grid caption

With menubarAdd we define the same actions
<?php 
require_once '../../../../php/demo/tabs.php';
?>
<!DOCTYPE html>
<html>
  <head>
    <title>jqGrid PHP Demo</title>
    <link rel="stylesheet" type="text/css" media="screen" href="../../../../css/jquery-ui.css" />
    <link rel="stylesheet" type="text/css" media="screen" href="../../../../css/trirand/ui.jqgrid.css" />
    <link rel="stylesheet" type="text/css" media="screen" href="../../../../css/ui.multiselect.css" />
    <style type="text">
        html, body {
        margin: 0;            /* Remove body margin/padding */
        padding: 0;
        overflow: hidden;    /* Remove scroll bars on browser window */
        font-size: 75%;
        }
        
    </style>
    <script src="../../../../js/jquery.min.js" type="text/javascript"></script>
    <script src="../../../../js/trirand/i18n/grid.locale-en.js" type="text/javascript"></script>
         <script src="../../../../js/trirand/jquery.jqGrid.min.js" type="text/javascript"></script> <script type="text/javascript">         
    $.jgrid.no_legacy_api = true;
    $.jgrid.useJSON = true;
    $.jgrid.defaults.width = "700";
    </script>
     
    <script src="../../../../js/jquery-ui.min.js" type="text/javascript"></script>
  </head>
  <body>
      <div>
          <?php include ("grid.php");?>
      </div>
      <br/>
      <?php tabs(array("grid.php"));?>
   </body>
</html>
grid.php.
<?php
require_once '../../jq-config.php';
// include the jqGrid Class
require_once ABSPATH."php/PHPSuito/jqGrid.php";
// include the driver class
require_once ABSPATH."php/PHPSuito/DBdrivers/jqGridPdo.php";
// Connection to the server
$conn = new PDO(DB_DSN,DB_USER,DB_PASSWORD);
// Tell the db that we use utf-8
$conn->query("SET NAMES utf8");

// Create the jqGrid instance
$grid = new jqGridRender($conn);
// Write the SQL Query
$grid->SelectCommand = 'SELECT OrderID, RequiredDate, ShipName, ShipCity, Freight FROM orders';
// set the ouput format to json
$grid->dataType = 'json';
// Let the grid create the model
$grid->setColModel();
// Set the url from where we obtain the data
$grid->setUrl('grid.php');
// Set some grid options
$grid->setGridOptions(array(
    "rowNum"=>10,
    "rowList"=>array(10,20,130),
    "sortname"=>"OrderID",
    "height"=>200,
    "colMenu"=>true,
    // enable menubar
    "menubar"=>true,
    "caption"=> "Custom menu bar"
    )
);
$grid->setColProperty("OrderID", array(
    // colMenu for particular column
    "colmenu"=>true,
    // set which actions to perform
    "coloptions"=> array("sorting"=>true, "columns"=> true, "filtering"=>true, "seraching"=>true, "grouping"=>false, "freeze" => true)
));

// Define menubar actions

$menubar = array(
    array(
        'id' => 'das',
        //cloasoncall : true,
        'title' => 'Sort by OrderID',
        'click' => 'js:function ( event) {
            $("#grid").jqGrid("sortGrid","OrderID");
        }',
    ),
    // divider
    array(
        "divider" => true
    ),
    array(
        'id' => 'was',
        //cloasoncall : true,
        'title' => 'Toggle Visibility',
        'click' => 'js:function ( event) {
            var state = (this.p.gridstate === "visible") ? "hidden" : "visible";
            $("#grid").jqGrid("setGridState",state);
        }'
    )
);
$grid->callGridMethod('#grid', 'menubarAdd', array( $menubar) );
// Enable footerdata an tell the grid to obtain it from the request
$grid->setGridOptions(array("footerrow"=>true,"userDataOnFooter"=>true));
// Change some property of the field(s)
$grid->setColProperty("RequiredDate", array("formatter"=>"date","formatoptions"=>array("srcformat"=>"Y-m-d H:i:s","newformat"=>"m/d/Y")));
// At end call footerData to put total  label
$grid->callGridMethod('#grid', 'footerData', array("set",array("ShipCity"=>"Total:")));
// Set which parameter to be sumarized
$summaryrows = array("Freight"=>array("Freight"=>"SUM"));
$grid->renderGrid('#grid','#pager',true,$summaryrows , null, true,true);