<ul>
<li>American League<ul>
<li id="ale">East<ul>
<li>Baltimore</li>
<li>Boston</li>
<li>New York</li>
<li>Toronto</li>
<li>Tampa Bay</li>
</ul></li>
<li id="alc">Central<ul>
<li>Chicago</li>
<li>Cleveland</li>
<li>Detroit</li>
<li>Kansas City</li>
<li>Minnesota</li>
</ul></li>
<li id="alw">West<ul>
<li>Los Angeles</li>
<li>Oakland</li>
<li>Texas</li>
<li>Seattle</li>
</ul></li>
</ul></li>
</ul>

In style element (<style type="text/css">) within head element:

#ale { visibility: hidden; }
#alw { visibility: hidden; }
* { font-family: arial,helvetica,sans-serif; }