# wget http://www.xdebug.org/files/xdebug-2.1.0.tgz
# tar zxf xdebug-2.1.0.tgz
# cd xdebug-2.1.0
# phpize
# ./configure
# make
# make install

/libraries/MY_Model.php
public function setField($table_name, $fields){
    $_field= '_field_'.$table_name;
    $this->{$_field} = $fields;
}

/models/Cards.php
protected $_field_cards = 'id, collections_id, name, energy, max_energy, type, class, sort, status, created, updated';

public function getCard(){
        $this->db->select($this->_field_cards);
        $this->db->from('cards');
        $dbh = $this->db->get();
        $result = array();
        foreach($dbh->result_array() as $row)
            $result[] = $row;

        $this->num_rows = (int)$dbh->num_rows();

        return $result;
}

public function __set($name, $value) {
    $this->{$name} = $value;
}

protected function _v($templates) {
    $data = array();
    $vars = get_object_vars($this);
    if(!empty($vars))
        foreach($vars as $name => $value)
            if(!is_object($value)) $data[$name] = $value;

    $this->smarty->view($this->header, $data);
    if(is_array($templates))
        foreach($templates as $v)
            $this->smarty->view($v, $data);
    else
        $this->smarty->view($templates, $data);

    $this->smarty->view($this->footer, $data);

    return $this->output->get_output();
}

public function getUser(){
    $dbh = $this->db->get('user');
    $result = array();
    foreach($dbh->result_array() as $row)
        $result[] = $row;
    return $result;
}

public function getUserById($id){
    $this->db->where('id', $id);
    return $this->getUser();
}

public function getUserLimit($offset = 0, $limit = 10){
    $this->db->limit($limit, $offset);
    return $this->getUser();
}