Need help related to my codeigniter wallpaper script

You are opening a dropdown named 'license_type':

PHP Code:

form_dropdown('license_type',array()); 


And later on you are trying to fetch a 'license' that's supposed to be 'license_type'. Also you need a haystack in your in_array.
in_array validates your post (license_type) and try to match it against a haystack. haystack = all possible options.
http://php.net/manual/en/function.in-array.php

PHP Code:

'license' => in_array($this->input->post('license_type')) ? $this->input->post('license') : '2', 


PHP Code:

$haystack = (1,2,3,4,5,6); // Don't hardcode this if you have an array already
'license' => in_array($this->input->post('license_type'),$haystack) ? $this->input->post('license_type') : '2',