CakePhp禁用了多个复选框formhelper

Question

我有多个复选框，我尝试禁用它，但我不能

$form->input('TransactionPelayananDetail.id',
array(
     'multiple' => 'checkbox', 
     'options' => $kb, 
     'div' => false,
     'label' => false,
     'data-input-id' => 'id', 
     'class' => 'checkbox left span4',
     'selected' => $kbs, 
     'readonly' => 'readonly',
     'disabled'=>'disabled'
)
);

任何想法？