jQuery UI Selectable

jQuery UI Selectable


Couple questions:
<ol id="selectable">
    <li class="ui-widget-content">Item 1</li>
    <li class="ui-widget-content">Item 2</li>
    <li class="ui-widget-content">Item 3</li>
    <li class="ui-widget-content">Item 4</li>
    <li class="ui-widget-content">Item 5</li>
    <li class="ui-widget-content">Item 6</li>
</ol>
http://jqueryui.com/demos/selectable/#serialize
With the code on the demo page above, the values are automatically set
to 1-6. How can I use my own values? I want to populate the
selectables with a key value pair.
My second question is, can I just add a form around the code? How will
I get the values in PHP?
Thanks