Code element changing input

I'm pasting some code into the code element, in the html area that opens at the bottom of the page in Builder. After I save the code, all the paths are changed. Why is that?
I'm pasting:

<ul class="footer-logo">
<li><a href="http://www.usace.army.mil/"><img src="/wp-content/uploads/2017/06/footer-logo1.jpg" alt="US Army Corps of Engineers"></a></li>
<li><a href="http://calseia.org"><img src="/wp-content/uploads/2017/06/footer-logo2.jpg" alt="California Solar Energy Industries Association"></a></li>
<li><a href="http://stationhouston.com"><img src="/wp-content/uploads/2017/06/footer-logo3.jpg" alt="Station Houston"></a></li>
<li><a href="http://www.usgbc.org/"><img src="/wp-content/uploads/2017/07/footer-logo4.jpg" alt="USGBC and the related logo are trademarks owned by the U.S. Green Building Council® and are used with permission"></a></li>

and after I click "Save" and "OK" and "Save Theme", the code has changed to this:

<ul class="footer-logo">
<li><a href="/wp-content/themes/vert-solar-custom-theme/images/global-regions/footer/footer-logo1.jpg"></a></li>
<li><a href="/wp-content/themes/vert-solar-custom-theme/images/global-regions/footer/footer-logo2.jpg"></a></li>
<li><a href="/wp-content/themes/vert-solar-custom-theme/images/global-regions/footer/footer-logo3.jpg"></a></li>
<li><a href="/wp-content/themes/vert-solar-custom-theme/images/global-regions/footer/footer-logo4.jpg"></a></li>