How do I set the class for <ul> tag in multilevel submenu in zend_navigation

I am using an xml file in creating my navigation in a zend framework app. I 开发者_如何学Gohave a multilevel menu like so:

<config>
<home>
    <label>Home</label>
    <uri>/home</uri>
    <resource>home</resource>
    <id>home</id>
</home>
<register>
    <label>Register</label>
    <uri>/register</uri>
    <resource>register</resource>
    <id>register</id>
</register>
<rates>
    <label>Manage Rates</label>
    <uri>#</uri>
    <resource>managerate</resource>
    <id>managerate</id>
    <pages>
        <charges>
            <label>Transfer Charges</label>
            <uri>/managerates</uri>
        </charges>
        <commission>
            <label>Agent Commission</label>
            <uri>/managerates</uri>
        </commission>
        <exchangerate>
            <label>Exchange Rate</label>
            <uri>/managerates</uri>
        </exchangerate>
    </pages>
</rates>
</config>

The tag renders as a ul tag which wraps around a bunch of li. The overall ul is given a class="navigation". What I want to do is to be able to is assign class attributes to child ul tags, as many levels as the tree goes. Been struggling with this for some time.

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Assuming I have understood your question correctly:-

To add a class to any menu item, just add it as an element in your xml file. For example to give your commission menu item the class 'commission':-

<commission>
    <label>Agent Commission</label>
    <uri>/managerates</uri>
    <class>commission</class>
</commission>