Bootstrap find DIV height and place new DIV

Question

articles updates from database and each article with different text length, locate on under <P> tag . Bootstrap <div> having col-lg-3 class as flowing image

But I want to find most top place (min height from top) and place next DIV tag(new article paragraph) as follows. this logic should be different with my previous question

<div class="row">
<?php
    foreach ($article as $add) {
        echo "<div class='col-lg-3'>";
        echo "<p class=''><b>(". $add->article_id .")</b> ". $add->content . "</p><hr>";
        echo "</div>";
    }      
?>    
</div>