Show navbar ` ` according to the role of user in php

Here I have a navbar.php file where I'm calling it to different dashboard according to user role and I'm differentiating by using a flag in my db table. i.e., flag = 0 and flag = 1.

Below is my navbar.php code

<?php
include('db.php');
date_default_timezone_set('Asia/Calcutta');


    $sql = "SELECT * FROM login";
$stmt = $db->prepare($sql);
$stmt->execute();
$res = $stmt->fetch();


?>
<div class="sidebar" data-color="purple" data-image="assets/img/sidebar-5.jpg">


<div class="sidebar-wrapper">
    <div class="logo">
        <a href="#" class="simple-text">
            Test
        </a>
    </div>

    <ul class="nav">

            <li class="active">
                <a href="dashboard.php">
                    <i class="pe-7s-graph"></i>
                    <p>Dashboard</p>
                </a>
            </li>

            <?php if($res["flag"] == "1"){
                 ?>
            <li>
                <a href="user.html">
                    <i class="pe-7s-user"></i>
                    <p>User</p>
                </a>
            </li>
            <li>
                <a href="table.html">
                    <i class="pe-7s-note2"></i>
                    <p>List</p>
                </a>
            </li>
            <?php } else {
            ?>
            <li class="disable">
                <a href="">
                    <i class="pe-7s-user"></i>
                    <p>User</p>
                </a>
            </li>
            <li class="disable">
                <a href="">
                    <i class="pe-7s-note2"></i>
                    <p>List</p>
                </a>
            </li>
        <?php }?>
    </ul>
</div>

As shown above. if the flag is 0(zero) also in db the first <li> is displaying. It is not going to else part <li>.

Can anyone tell me what wrong am I doing here?