old/application/models/EmailModel.php

<?php
    defined('BASEPATH') OR exit('No direct script access allowed');

    class EmailModel extends CI_Model
    {

        function __construct()
        {
            parent::__construct();
        }

        function sendMail($recipient, $subject, $template, $templateData) {
            $this->load->library('email');

            $config['mailtype'] = 'html';
            $this->email->initialize($config);

            $this->email->from('no-reply@kingofdog.eu', 'KingOfDog.eu');
            $this->email->to($recipient);

            $this->email->subject($subject);
            $this->email->message($this->load->view('emails/' . $template, $templateData, true));

            $this->email->send();
        }

    }