You can add your own apply method for job applications.
function job_bm_filters_apply_method_extra($apply_method){
$apply_method_new = array('method_1'=>'Method 2','method_1'=>'Method 2');
$apply_method = array_merge($apply_method,$apply_method_new);
return $apply_method;
}
add_filter('job_bm_filters_apply_method','job_bm_filters_apply_method_extra');
