How can I add a widget at the end of my YAMM menu? about yamm-nav-walker HOT 5 CLOSED

public function end_lvl( &$output, $depth = 0, $args = array() )
{
    $output .= ($depth == 0) ?
        "\n<div>Hello, world</div>\n" .
        "\n</div>\n" . // .row
        "\n</div>\n" . // yamm-content
        "\n</ul>\n" // .dropdown-menu
        : "\n</ul>\n"; // else .subcat-ul
}

<ul class='dropdown-menu'>
    <div class='yamm-content'>
        <div class='row'>
            <div>Hello, world</div>
        </div>
    </div>
</ul>

public function end_lvl( &$output, $depth = 0, $args = array() )
{
    $output .= ($depth == 0) ?
        "\n" . dynamic_sidebar('sidebar-featured-shop') . "\n" .
        "\n</div>\n" . // .row
        "\n</div>\n" . // yamm-content
        "\n</ul>\n" // .dropdown-menu
        : "\n</ul>\n"; // else .subcat-ul
}

<div class="sidebar-featured">(Sidebar content)</div>
<ul class="nav navbar-nav>
    <li class="dropdown">
        <a class="dropdown-toggle" data-toggle="dropdown" data-target="#" href="//localhost:3000/shop/">Shop <b class="caret"></b></a> 
        <ul class="dropdown-menu">
            <div class="yamm-content">
                ...
            </div>
        </ul>
    </li>
</ul>