$form->input checkbox foreign key other than name. cakephp

How can I add label for input other than name or more than name, eg

<label for="category_id">Name - Initial</label>
  <开发者_StackOverflow社区input id="category" />

I tried this.

echo $this->Form->input('category_id', array('multiple'=>'checkbox','label' => 'Category.initials'));

This is what I want to achieve.

 <label for="category_id">Name - Initial</label>
      <input id="category" />

ANSWER FROM GOOGLE!

You can create a virtual field[1] in the model.

public $virtualFields = array(
    'full_name' => 'CONCAT(User.last_name, ", ", User.first_name)'
);

Then, I believe (haven't tried this) that you could specify full_name as the model's display field:

public $displayField = 'full_name'; 

As far as I understand it you can set the label to anything you want by passing it a string:

array( 'label' => 'Name - Initial');

Or you could build that string out of some pre-existing variables:

array( 'label' => $name . ' . ' . $initial);

Or have I misunderstood what you're trying to do?