I\'ve been trying to push an item to an associative array like this:
$new_input[\'name\'] = array( \'type\' => \'text\', \'label\' => \'First
WebbieDave's solution will work. If you don't want to overwrite anything that might already be at 'name', you can also do something like this:
$options['inputs']['name'][] = $new_input['name'];