toutpratique/override/controllers/front/IndexController.php

<?php
require_once _PS_MODULE_DIR_.'cmsps/classes/CmsPsEdito.php';
require_once _PS_MODULE_DIR_.'cmsps/classes/CmsPsPost.php';

class IndexController extends IndexControllerCore
{
	public function initContent() 
	{		
		$id_lang = Context::getContext()->language->id;
		
		$edito = CmsPsEdito::getLast($id_lang);
		$posts = CmsPsPost::getPostHome($id_lang);

		$this->context->smarty->assign(array(
			'edito' => $edito,
			'posts_home_1' => array_slice($posts, 0, 3),
			'posts_home_2' => array_slice($posts, 3, 4),
			'posts_home_3' => array_slice($posts, 7, 3),
			'posts_home_4' => array_slice($posts, 10, 3),
			'posts_home_5' => array_slice($posts, 13, 1)
		));

		parent::initContent();
	}
}