You’re using a mixture of <p> and <div> tags to create these sponsors, you need to be consistant for this to work and make them all <p> tags instead.
Change the structure by which you’re adding these sponsors so you’re using one <p> tag for both the image and the <span> that contains the sponsor text, something like this:
<p>
<a href="#">
<img src="#">
</a>
<span>text</span>
</p>
You should only end up with 4 <p> tags in total for these 4 sponsors.
This will allow you to use CSS (use a Custom CSS plugin), for this page only, like so:
.post-99 .entry-content p { width: 45%; float: left; margin: 2.5%; min-height: 220px; }
Providing you change the structure as described above, you will end up with a grid-style sponsor page, like this.
Hope this helps.
