<header class="mui-bar mui-bar-nav">
  <button class="mui-btn mui-btn-link mui-btn-nav mui-pull-left">
    <span class="mui-icon mui-icon-left-nav"></span>
    Left
  </button>
  <button class="mui-btn mui-btn-link mui-btn-nav mui-pull-right">
    Right
    <span class="mui-icon mui-icon-right-nav"></span>
  </button>
  <h1 class="mui-title">Title</h1>
</header>