Small DB Driver for CodeIgniter v3, that allows the use of DynamoDB instead SQL database
Just download the AWS PHP SDK and extract it into system/libraries.
In application/config/database.php add the following:
$db['default'] = array(
'key' => 'YOUR_AWS_KEY',
'region' => 'YOUR_AWS_REGION',
'secret' => 'YOUR_AWS_SECRET',
'dbdriver' => 'dynamodb',
'version' => 'latest'
);