SO - 30634625

by Arun P Johny

HTML

<div class="frame">
    <div class="timeline-badge"><i class="fa fa-twitch"></i> </div>
    <span class="timeline-date"></span>
    <div class="timeline-content"></div>
</div>
<br/>
<span class="dateClass">date1</span>
<span class="dateClass">date2</span>
<span class="dateClass">date3</span>
<div class="contentClass">content1</div>
<div class="contentClass">content2</div>
<div class="contentClass">content3</div>

JavaScript

var dateClasses = $('.dateClass'); // array of all your dateClasses
var contentClasses = $('.contentClass'); // array of all your contentClasses

$('.frame .timeline-date').append(dateClasses);
$('.frame .timeline-content').append(contentClasses);