Adding style to CakePHP automatically created input div - css

Question

CakePHP creates a div that automatically wraps any of its input tags that are built with the formhelper as followed:
$this->formhelper->input('something');
Such that the output looks about as followed:
<div class='input'>
<input />
</div>
I know that there is a way to add classes to the input tag i.e.
$this->formhelper->input('text', array('class' => 'some_css'));
But how would you add a style to the div that is automatically created by CakePHP. This might be something where the core needs to be hacked, but I want to know if there is a better way to do this, so that I get something as followed:
<div class='input other_class_I_want_here'>
<input />
</div>
Thank you to anyone who can help.

Answer 1

Simply add a new class to the div.
$this->formhelper->input('text', array('div'=>array('class'=>'divClass'),'class' => 'some_css'));
should actually output
<div class='input divClass'>
<input class='other_class_I_want_here' />
</div>

Answer 2

The above answer is certainly correct. And works beautifully if you only require adding a class in a one (or a few) specific locations.
However, anyone arriving here looking for a way to add a class to input div wrappers application-wide (ex: if you're using a front-end framework which often requires a specific class name be added to input wrappers to enable auto-styles) there is a MUCH better solution. That being, a custom FormHelper.
In the App/View/Helper directory create and save a file "MySuperCoolFormHelper.php"
Place the following code in the file:
App::uses('FormHelper', 'View/Helper');
class MySuperCoolFormHelper extends FormHelper {
protected function _divOptions($options) {
if(isset($options['div'])
$options['div'] .= ' class1 class2 class3'; //note the prefixing space
else
$options['div'] = 'class1 class2 class3';
return parent::_divOptions($options);
}
}
To use this new form helper globally, add the following code to your AppController:
public $helpers = array(
'Form' => array(
'className' => 'MySuperCoolFormHelper'
)
//The rest of your helper inits
);
... and BLAMMO you're done!

Answer 3

CakePHP 3:
For applying 'form-group' to DIV and 'form-control' to the input field
<?=
$this->Form->control('year', [
'type' => 'select',
'value' => $year,
'options' => $years,
'label' => false,
'class' => 'form-control',
'templates' => ['inputContainer' => '<div class="form-group">{{content}}</div>']
]);
?>