AdminXXXController extends ModuleAdminController

AdminXXXController.php

public function renderForm()
{
	// ...
	
    $this->fields_form[0]['form'] = array(
        array(
			'label' => $this->l('Manufacturers:'),
			'name' => 'manufacturers',
			'type' => 'checkbox_manufacturers',
			'values' => array(
				'query' => Manufacturer::getManufacturers(),
				'id' => 'id_manufacturer',
				'name' => 'name'
			),
		    'required' => true
		)
	);
	
	// ...
}

modules\xxx\views\templates\admin\xxx\helpers\form\form.tpl

{elseif $input.type == 'checkbox_manufacturers'}
    ...