$this->widget('ext.widgets.multiselects.XMultiSelects',array(
    'leftTitle'=>'Australia',
    'leftName'=>'Person[australia][]',
    'leftList'=>Person::model()->findUsersByCountry(14),
    'rightTitle'=>'New Zealand',
    'rightName'=>'Person[newzealand][]',
    'rightList'=>Person::model()->findUsersByCountry(158),
    'size'=>20,
    'width'=>'200px',
));