bellows_icon_custom_class
This filter allows you to filter the icon class for individual items
$icon_class
The icon class as a string.
$item_id
The ID of the menu item.
$custom_class
Any custom classes that were set for the item.
Example: Add a rocket icon to every item
add_filter( 'bellows_icon_custom_class' , 'bellows_icon_filter' , 10 , 3 );
function bellows_icon_filter( $icon_classes , $item_id , $custom_class ){
$icon_classes.= ' fa fa-rocket';
return $icon_classes;
}