Jquery默认使用drupal菜单

我在drupal中有一个页脚菜单，它包含很多菜单项

<ul class="menu">
<li class="expanded first business">
<a title="" href="/content/business-tab">Business</a>
<ul class="menu">
<li class="leaf first about_business_mobile">
<a title="" href="/content/about-business-mobile">About Business Mobile</a>
</li>
<li class="leaf business_mobile_solutions">
<a title="" href="/content/business-pay-monthly">Business Mobile Solutions</a>
</li>
<li class="leaf value_packs">
<a title="" href="/content/business-value-packs">Value Packs</a>
</li>
<li class="leaf mobile_broadband">
<a title="" href="/content/mobile-broadband">Mobile Broadband</a>
</li>
<li class="leaf handsets">
<a title="" href="/content/handsets">Handsets</a>
</li>
<li class="leaf overseas_roaming">
<a title="" href="/content/overseas-roaming">Overseas Roaming</a>
</li>
<li class="leaf last overseas_calling_rates">
<a title="" href="/content/overseas-calling-rates">Overseas Calling Rates</a>
</li>
</ul>
</li>
<li class="expanded personal">
<a title="" href="/content/personal">Personal</a>
<ul class="menu">
<li class="leaf first about_personal_mobile">
<a title="" href="/content/personal-prepay">About Personal Mobile</a>
</li>
<li class="leaf personal_mobile_solutions">
<a title="" href="/content/personal-prepay">Personal Mobile Solutions</a>
</li>
<li class="leaf value_packs">
<a title="" href="/content/additional-packs-0">Value Packs</a>
</li>
<li class="leaf mobile_broadband">
<a title="" href="/content/mobile-broadband">Mobile Broadband</a>
</li>
<li class="leaf handsets">
<a title="" href="/content/handsets">Handsets</a>
</li>
<li class="leaf overseas_roaming">
<a title="" href="/content/overseas-roaming">Overseas Roaming</a>
</li>
<li class="leaf last overseas_calling_rates">
<a title="" href="/content/overseas-calling-rates">Overseas Calling Rates</a>
</li>
</ul>
</li>
</ul>

但是当我执行脚本时，它只是停止了扩展菜单下的每个链接的工作。

这应该可以做到：

$('#footer li.expanded a').click(function(e) {
    if(!$(this).parent().hasClass('leaf')){
        e.preventDefault();
    }
});

$('#footer li.expanded a').click(function(e) {
    if(!$(this).parent().hasClass('leaf')){
        e.preventDefault();
    }
});