Bootstrap push down column - php

Question

How can I accomplish for Bootstrap to push a column on next line if doesn't fit? This is a link how it is right now: Link to current page
Image of current page:
This is an image how it is right now. I'd like that the third image to drop to the row below if it doesn't fit.
This is code below
<div class="row">
<?php
if($members):
?>
<ul class="team_members">
<li>
<?php foreach($members as $member): ?>
<div class="cl col-xs-12 col-sm-3 col-md-3 col-lg-3">
<?php if($member["member_avatar"]): ?>
<div class="animated">
<div class="member drivprojekt" style="border-radius: 50%; width: 100%; height: 100%; overflow: hidden;">
<img src="<?php echo $member["member_avatar"]["sizes"]["member_thumb"]; ?>" alt="" />
</div>
</div>
<?php endif; ?>
</div>
<div class="cl col-xs-12 col-sm-3 col-md-3 col-lg-3">
<div class="member_info">
<h3><?php echo $member["member_name"]; ?></h3>
<h4><?php echo $member["member_position"]; ?></h4>
<p><?php echo do_shortcode(nl2br($member["member_description"])); ?></p>
</div>
</div>
<?php endforeach; ?>
</li>
</ul>
<?php endif; ?>
</div>

Answer 1

use flex-box
ul.team_members li{
display: flex;
flex-wrap: wrap;
}

Answer 2

you can use this kind of divs if you want. Its just a suggestion
<div class="cl col-xs-12 col-sm-3 col-md-2 col-lg-3"></div>
replace col-md-3 to col-md-2