Append HTML and Text into a LI
<p>How can I append a blurb of text into my first <code>LI</code>s'</p>

<pre><code>  &lt;ul id="topnav"&gt;
    &lt;li class="mainNavFirst"&gt;&lt;a href="/solutions"&gt;Solution&lt;/a&gt;
    &lt;li class="mainNavLast"&gt;&lt;a href="/contact"&gt;Contact Us&lt;/a&gt;&lt;/li&gt;
  &lt;/ul&gt;
</code></pre>

<p>I want to append text inside </p>

<pre><code>&lt;li class="mainNavFirst"&gt;&lt;a href="/solutions"&gt;Solution &lt;span&gt;Blurb Goes Here&lt;/span&gt;&lt;/a&gt;
</code></pre>
