Display multi-select input field.

Code sample:

array(
    'id'		=> 'someid_select_multi_field',
    'title'		=> __('Multi Select  Field','text-domain'),
    'details'	=> __('Description of multi select field','text-domain'),
    'type'		=> 'select_multi',
    'default'      => array('option_2'),
    'args'		=> array(
        'option_1'	=> __('Option 1','text-domain'),
        'option_2'	=> __('Option 2','text-domain'),
        'option_3'	=> __('Option 3','text-domain'),
        'option_4'	=> __('Option 4','text-domain'),
    ),
),

Preview:

 Option Framework