Косяк в левом меню (ссылка на сайт + код html и css)

<ul id="left_menu" class="folding leftmenu">
<li class="first"><a href="#" onclick="javascript:return false;"><span class="s1"><span class="s2">Пиломатериал</span></span></a>
<ul>
<li class="first"><a href="/natural_moisture.html"><span class="s1"><span class="s2">Естетственной влажности</span></span></a></li>
<li class="first"><a href="/kiln_dried.html"><span class="s1"><span class="s2">Камерной сушки</span></span></a></li>
</ul>
</li>
<li><a href="/moldings.html"><span class="s1"><span class="s2">Погонажные изделия</span></span></a></li>
<li><a href="#" onclick="javascript:return false;"><span class="s1"><span class="s2">Домостроение</span></span></a><ul>
<li class="first"><a href="/timber_framed_house_building.html"><span class="s1"><span class="s2">Брусовое домостроение</span></span></a></li>
<li class="first"><a href="/frame_houses.html"><span class="s1"><span class="s2">Каркасное домостроение</span></span></a></li>
</ul>
</li>
<li><a href="/custom-made_furniture.html"><span class="s1"><span class="s2">Мебель на заказ</span></span></a></li>
<li><a href="/products_from_an_array_of.html"><span class="s1"><span class="s2">Изделия из масива</span></span></a></li>
<li class="first"><a href="/delivery-services.html"><span class="s1"><span class="s2">Услуги доставки</span></span></a></li>
<li class="folder last"><a onclick="javascript:return false;" href="#"><span class="s1"><span class="s2">Прайсы</span></span></a><ul style="display: none;">
<li class="last"><a href="#"><span class="s1"><span class="s2">Оптовый прайс</span></span></a></li>
<li class="last"><a href="#"><span class="s1"><span class="s2">Мелкооптовый прайс</span></span></a></li>
<li class="last"><a href="#"><span class="s1"><span class="s2">В наличии на складе</span></span></a></li>
</ul>
</ul>

#left_menu { margin:0; padding:20px 15px 15px 16px; list-style:none; }
#left_menu li { font-size:0; line-height:0; vertical-align:top; padding:2px 0; }
#left_menu li a { display:block; line-height:normal; font:bold 13px Arial, Helvetica, sans-serif; color:#faf0a5; padding:5px 0 0 0; text-decoration:none; }
#left_menu li a:hover { background:url(../images/lm_h_top.png) 0 0 no-repeat; }
#left_menu li a span.s1 { display:block; }
#left_menu li a:hover span.s1 { background:url(../images/lm_h_bot.png) 0 100% no-repeat; }
#left_menu li a span.s1 span.s2 { display:block; padding:0 5px 5px 24px; background:url(../images/lm_list.gif) 6px 3px no-repeat; }
#left_menu li a:hover span.s1 span.s2 { background:url(../images/lm_h_list.gif) 6px 3px no-repeat; }
#left_menu li.l2 a:hover {background:none; text-decoration:none}
#left_menu li.l2 a:hover span.s1 {background:none}
#left_menu li.l2 a:hover span.s1 span.s2 {background:url(../images/lm_h_list.gif) 6px 3px no-repeat;}

<a href="ссылка"></a>