CodingForums.com - PHP dropdown menu

How could I get this big chunk of html code into a PHP file ready to be inserted into a html document as a dropdown navigation menu?
Code:
<ul id="nav">



<li><a href="index.html">Home</a>

<li><a href="New Bridges.html ">New Bridges</a>

<li><a href="Cool Bridges.html ">Cool Bridges</a></li>

<li><a href="JMBPcontactpage.html ">Contact Me</a></li>

<li><a href="Mission.html ">About This Site</a></li>

<li><a href="Glossary.html ">Glossary</a></li>

<ul>

<li><a href="IL_COUNTIES ">Illinois Bridges</a>

<ul class="scrollable">

<li><a href="Jo Daviess County.html">Jo Daviess County</a></li>

</ul>

<li><a href="IA_COUNTIES ">Iowa Bridges</a>

<ul class="scrollable">

<li><a href="Dallas County.html">Dallas County</a></li>

<li><a href="Emmet County.html">Emmet County</a></li>

<li><a href="Floyd County.html">Floyd County</a></li>

<li><a href="Hamilton County.html">Hamilton County</a></li>

<li><a href="Polk County IA.html">Polk County</a></li>

<li><a href="Webster County.html">Webster County</a></li>

<li><a href="Wright County IA.html">Wright County</a></li>

</ul>

<li><a href="MN_COUNTIES ">Minnesota Bridges</a>

<ul class="scrollable">

<li><a href="Blue Earth County.html">Blue Earth County</a></li>

<li><a href="Brown County.html">Brown County</a></li>

<li><a href="Carver County.html">Carver County</a></li>

<li><a href="Chippewa County.html">Chippewa County</a></li>

<li><a href="Cottonwood  County.html">Cottonwood County</a></li>

<li><a href="Dakota County.html">Dakota County</a></li>

<li><a href="Grant County.html">Grant County</a></li>

<li><a href="Hennepin County.html">Hennepin County</a></li>

<li><a href="Jackson County.html">Jackson County</a></li>

<li><a href="Le Seuer County.html">Le Seuer County</a></li>

<li><a href="Lyon  County.html">Lyon County</a></li>

<li><a href="McLeod County.html">McLeod County</a></li>

<li><a href="Morrison County.html">Morrison County</a></li>

<li><a href="Nicollet County.html">Nicollet County</a></li>

<li><a href="Norman County.html">Norman County</a></li>

<li><a href="Otter Tail County.html">Otter Tail County</a></li>

<li><a href="Polk  County.html">Polk County</a></li>

<li><a href="Ramsey County.html">Ramsey County</a></li>

<li><a href="Redwood County.html">Redwood County</a></li>

<li><a href="Renville County.html">Renville County</a></li>

<li><a href="Rice County.html">Rice County</a></li>

<li><a href="Scott County.html">Scott County</a></li>

<li><a href="Stearns County.html">Stearns County</a></li>

<li><a href="Steele County.html">Steele County</a></li>

<li><a href="Wadena County.html">Wadena County</a></li>

<li><a href="Waseca County.html">Waseca County</a></li>

<li><a href="Washington County.html">Washington County</a></li>

<li><a href="Yellow Medicine County.html">Yellow Medicine County</a></li>

</ul>

<li><a href="Grand Forks.html ">North Dakota Bridges</a>

<ul class="scrollable">

<li><a href="Grand Forks.html">Grand Forks Area</a></li>

</ul>

<li><a href="WI_COUNTIES ">Wisconsin Bridges</a>

<ul class="scrollable">

<li><a href="Chippewa County WI.html">Chippewa County</a></li>

<li><a href="Dunn County.html">Dunn County</a></li>

<li><a href="Eau Claire County.html">Eau Claire County</a></li>

<li><a href="Polk County WI.html">Polk County</a></li>

</ul>
Thanks,
John