magento 1 - How to addClass without JS to the dropdown filter in Admin custom grid

Question

I want to add class to the magento admin custom grid filter dropdown.

I have dropdown in one filter column and I dont want to use JS to reduce client side load.

Is there anyway to add class while preparing column to the grid.php?

$this->addColumn('mfg', array(
   'header' => Mage::helper('manufacturer')->__('Manufacturer'),
   'index' => 'mfg_id',
   'filter_index' => 'SFOIA.mfg_id',
   'type' => 'options',
   'options' => $this->getManufacturersWithExtraOption(),
   'filter_condition_callback' => array($this, '_manufacturerCallback'),
));

I dont want add class to the column - Need class to the filter dropdown only. just in to its html

Thank you

Answer 1

this is good way to add class in your custom column

$this->addColumn('mfg', array(
            'header' => Mage::helper('manufacturer')->__('Manufacturer'),
            'index' => 'mfg_id',
            'filter_index' => 'SFOIA.mfg_id',
            'type' => 'options',
            'options' => $this->getManufacturersWithExtraOption(),
            'filter_condition_callback' => array($this, '_manufacturerCallback'),
            'column_css_class' => 'your_class'
        ));

column_css_class allows you to add a class to the columns that hold values.