align horizontally

HTML

<div class="container">
  <div class="menu">
    <div class="menu-item">
      menu1
    </div>
    <div class="menu-item">
      menu2
    </div>
  </div>
  <div class="content">
    some content
  </div>
</div>

CSS

div{
  border-style:solid;
}

.menu{
  display:inline-block;
}

.content{
  display:inline-block;
}