CodeIgniter limit posts per page - php

Question

I am creating a blog with CodeIgniter. My homepage shows posts that are coming from the database. I want to limit the posts for a page and create a link at the bottom to bring the next posts.
Please someone teach me how to do it with some example.
Thanks.
controller code
<?php
class Mysite extends CI_Controller
{
function index()
{
$this->load->model('posts_model');
$data['result']=$this->posts_model->getAll();
$this->load->helper('html');
$this->load->view("header");
$this->load->view("home",$data);
$this->load->view("footer");
}
?>
model code
<?php
class Posts_model extends CI_Model{
public function getAll(){
$this->load->database();
$query = $this->db->get('posts');
return $query->result();
}
}
?>
view code
<?php
foreach($result as $row) {
$a_url="mysite/single/".$row->id;
echo "<div id="."'postdiv'".">";
echo "<h1>".anchor($a_url,$row->title)."</h1>";
echo "<p>".$row->content."</p>";
echo "<p>Posted by : ".$row->author."</p>";
echo "<br>";
echo "</div>";
}
?>

Answer 1

Here is a nice blog showing load more pagination using jquery and codeigniter.
http://www.thetutorialblog.com/php/twitter-like-pagination-using-codeigniter-and-jquery/

Answer 2

Sample code. Try yourself
function getcountryByname($limit=NULL, $start=NULL) //select country
{
if($limit!=NULL) $this->db->limit($limit, $start);
$this->db->select('*');
$this->db->from('country');
$this->db->order_by("country_name", "ASC");
$query = $this->db->get();
return $query->result_array();
}