title: Make a flex item act like display block
body: <p>So I have a container which uses display flex, then 4 divs inside which the first one needs to act like it is used display block and the 3 others need to be as they are.</p>
  
  <p><strong>Code snippet demonstration :</strong></p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>#container {
    display: flex;
  }
  
  #menu {
    display: flex;
  }
  
  #menu p {
    margin: 0;
    padding: 8px;
    padding-bottom: 0;
  }
  
  .otherDivs {
    height: 700px;
    width: 10%;
    background-color: grey;
    margin-right: 5px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="container"&gt;
  
    &lt;div id="menu"&gt;
  
      &lt;p&gt;Btn&lt;/p&gt;
      &lt;p&gt;Btn&lt;/p&gt;
      &lt;p&gt;Btn&lt;/p&gt;
  
    &lt;/div&gt;
  
    &lt;div class="otherDivs"&gt;&lt;/div&gt;
    &lt;div class="otherDivs"&gt;&lt;/div&gt;
    &lt;div class="otherDivs"&gt;&lt;/div&gt;
  
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>How do I get the menu to display above those other divs?</p>
  
  <p>I know I could just put the menu div out of the container but I need to keep it within the container where it is because I am using it with Jquery tabs.</p>