Sending html email and using static template

$body contains the message and required the email-template.

Then you have to load the email library and the follwing to support HTML and send e-mail.
$this->email->set_mailtype("html");
$this->email->initialize($config);

$this->load->library('email');

$this->email->from('[email protected]', 'From Name');
$this->email->to('[email protected]');
$this->email->subject('Subject');
$this->email->message($body);
$this->email->send();