header.php

<header class="head-section">
    <div class="navbar navbar-default navbar-static-top container">
        <div class="navbar-header">
            <button class="navbar-toggle" data-target=".navbar-collapse" data-toggle="collapse" type="button"><span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span></button>
            <a class="navbar-brand" href="index.php"><img src="img/logo.gif" width="150px" style="margin: 0 auto"></a>
        </div>
        <div class="navbar-collapse collapse">
            <ul class="nav navbar-nav">
                <li><a href="index.php">Home</a></li>
                <li><a href="about.php">About Us</a></li>
                <li><a href="projects.php">Our Projects</a></li>
                <li><a href="team.php">Team</a></li>
                <li><a href="gallery.php">Gallery</a></li>
                <li><a href="sponsors.php">Sponsors</a></li>
                <li><a href="contactus.php">Contact Us</a></li>
            </ul>
        </div>
    </div>
</header>