Hi there,
You should be able to apply a class to the last div. I just did the following test:
I entered this dummy content into the WordPress text editor:
Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page.
[divup class='class-A, class-B']
Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page.
[divup class='class-C']
Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page.
And it resulted in the following output:
<div class="divup div-1 div-odd first class-A">
<p>Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page.</p>
</div>
<div class="divup div-2 div-even class-B">
<p>Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page.</p>
</div>
<div class="divup div-3 div-odd mul-3 last class-C">
<p>Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page. Some content on this page.</p>
</div>
Notice how adding class-C to the last [divup] shortcode resulted in the last div having the class “class-C”. if this isn’t happening for you, please could you post a link to the website you are working on so that I can troubleshoot this further.
Thanks,
Sebastian