1. Copy the repository files to application/libraries folder in your project directory.

• call neo4j library like this: $this->load->library('neo');

• open the neo library file and set the client in constructor

$this->client = new Client('server-url', server-port);
$this->client->getTransport()->setAuth('user', 'password');

$cypher = "match(n) return n limit 25";
$this->neo->execute_query($cypher);

###Read Wiki for class reference