Collapse WP Sidebar BS2

collapse-wp-bs2-sidebar09.php

<div class="navbar">
    <div class="navbar-inner">
        <div class="button-killer">
            <button type="button" class="btn btn-navbar" data-toggle="collapse" data-target="#secondary-nav">
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
            </button>
        </div>
        <div class="mobile-menu">Menu</div>
            <div class="nav-collapse collapse" id="secondary-nav">
                <ul class="nav">
                    <li class="dropdown">
                        <?php if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar() ) : ?>
                        <?php endif; ?>
                    </li>
                </ul>
            </div>
        </div>
</div>