It would require custom code created by a developer.
You can try finding a developer here to work on it:
http://geodirectoryexperts.com
It is not a simple thing to convert the current HTML into something like
<ol itemscope itemtype="http://schema.org/BreadcrumbList">
<li itemprop="itemListElement" itemscope
itemtype="http://schema.org/ListItem">
<a itemprop="item" href="https://example.com/dresses">
<span itemprop="name">Dresses</span></a>
<meta itemprop="position" content="1" />
</li>
<li itemprop="itemListElement" itemscope
itemtype="http://schema.org/ListItem">
<a itemprop="item" href="https://example.com/dresses/real">
<span itemprop="name">Real Dresses</span></a>
<meta itemprop="position" content="2" />
</li>
</ol>