Improved MVC layout of code

application/models/note.php

@@ -0,0 +1,48 @@
+<?php
+
+class Note extends CI_Model {
+
+    function __construct()
+    {
+        // Call the Model constructor
+        parent::__construct();
+    }
+
+	function list_all() {
+		return $this->db->get('notes');
+	}
+
+	function add() {
+		$data = array(
+			'cat' => $this->input->post('category'),
+			'title' => $this->input->post('title'),
+			'note' => $this->input->post('content')
+		);
+
+		$this->db->insert('notes', $data); 
+	}
+
+	function edit() {
+		$data = array(
+			'cat' => $this->input->post('category'),
+			'title' => $this->input->post('title'),
+			'note' => $this->input->post('content')
+		);
+
+		$this->db->where('id', $this->input->post('id'));
+		$this->db->update('notes', $data); 
+	}
+
+	function delete($id) {
+		$this->db->delete('notes', array('id' => $id)); 
+	}
+
+	function view($id) {
+		// Get Note
+		$this->db->where('id', $id); 
+		return $this->db->get('notes');
+	}
+
+}
+
+?>