My Form validation code.
<?php
/**

Form Validation
*/
class Form{
public $currentValue;
public $values = array();
public $errors = array();

public function __construct(){}

public function post($key){

 $this->valuse[$key] = trim($_POST[$key]);
 $this->currentValue = $key;
 return $this;

}

public function isEmpty(){

 if(empty($this->valuse[$this->currentValue])){
     $this->errors[$this->currentValue]['empty'] = "Field must be empty";
 }
 return $this;

}

public function isCatEmpty(){

 if($this->valuse[$this->currentValue] == 0){
     $this->errors[$this->currentValue]['empty'] = "Field must be empty";
 }
 return $this;

}

public function length($min=0, $max){

 if (strlen($this->valuse[$this->currentValue]) < $min OR strlen($this->valuse[$this->currentValue]) > $max) {
     $this->errors[$this->currentValue]['length'] = "Should Min ".$min." And Max " .$max. "Characters.";
 }
 return $this;

}

public function submit(){

 if(empty($this->errors)){
     return true;
 }else{
     return false;
 }

}

}

I don't found this problem.

My Category insert Code is

public function insertCategory(){
if(!($_POST)){
header("Location:".BASE_URL."/Admin/addCategory" smile ;
}
$input = $this->load->validation("Form";
$input->post('name'
->isEmpty();

$input->post('title' smile
->isEmpty();

    if ($input->submit()) {
        $tablePost     = "category";
        $name         = $input->values['name'];
        $title         = $input->values['title'];

        $data  = array(
        'name'  => $name,
        'title' => $title
        );
    $catModel = $this->load->model("CatModel");
    $result   = $catModel->insertCat($tableCat, $data);

    $mdata = array();
    if ($result == 1) {
        $mdata['msg'] = "Category Added Successfully.";
    } else {
        $mdata['msg'] = "Category Not Added Successfully.";
    }
    $url = BASE_URL."/Admin/categoryList?msg=".urlencode(serialize($mdata));
    header("Location:$url");
    } else {
        $data["postErrors"] = $input->errors;
        $tableCat = "category";
        $this->load->view("admin/header");
        $this->load->view("admin/sidebar");

        $catModel = $this->load->model("CatModel");
        $data['catlist'] = $catModel->catList($tableCat);

        $this->load->view("admin/addcategory", $data);
        $this->load->view("admin/footer");
    }    
}

this is data not inserted.
I don't understand why this problem.
post("name" smile
why post() method value don't work.
this line work not properly.
$name = $input->values['name'];
$title = $input->values['title'];
?>