CouchCMS Pages - Grouping every x post

couchcms-pages-grouping.php

<!-- Grouping every 4 posts -->
<cms:set fields='4' />

<!-- check index if the first in a row [ (index-1) modulus 4 == 0  ] -->
<cms:set temp="<cms:sub k_count '1' />"  />
<cms:set first_in_row="<cms:mod temp fields />"  />
<cms:if first_in_row == '0' >
    <div class="row">
</cms:if>

<!-- show content -->
<div class="col-md-3">contents goes here</div>

<!-- check index if the latest in a row, or the latest page  -->
<cms:set last_in_row="<cms:mod k_count fields />"  />
<cms:if last_in_row == '0' || k_count == k_total_records_on_page >
    </div>
</cms:if>