title: Bootstrap 4 Tab to Accordion. How to?
body: <p>I googled and found how to make Bootstrap 3 tab to accordion in responsive here <a href="https://codepen.io/dliebswager/pen/JfCLg" rel="noreferrer"><code>Bootstrap 3 tab to accordion</code></a>, but I'm using Bootstrap 4 and I don't know how to convert it to Bootstrap 4 tab to accordion. Please help me.</p>
  
  <p>Thanks!</p>