WEB/src/Template/Element/Eprosume/mainHeader.ctp

<div id="eprosume_overlay"><div class="eprosume_loader"></div></div>
<header class="main-header">
    <!-- Logo -->
    <a href="/web" class="logo">
        <!-- mini logo for sidebar mini 50x50 pixels -->
        <span class="logo-mini"><?= $app_short ?></span>
        <!-- logo for regular state and mobile devices -->
        <span class="logo-lg"><?= $app_logotype ?></span>
    </a>
    <!-- Header Navbar: style can be found in header.less -->
    <nav class="navbar navbar-static-top">
        <!-- Sidebar toggle button-->
        <a href="#" class="sidebar-toggle" data-toggle="push-menu" role="button">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
        </a>
    </nav>
</header>