webuser.php

<?php
class HWebUser extends CWebUser
{
    /**
     * @var User
     */
    protected $_model;
    
    /**
     * @return void
     */
    public function init()
    {
        parent::init();
        
        $this->assignRoles();
    }
    
    /**
     * @return User|null
     */
    public function getModel()
    {
        if ($this->_model === null) {
            $this->_model = User::model()->findByPk(intval($this->id));
        }
        return $this->_model;
    }
    
    /**
     * @return void
     */
    protected function assignRoles()
    {
        $auth = Yii::app()->authManager;
            
        $role = ($this->id == 1) ? 'owner' : false;

        if ($role && !$auth->isAssigned($role, $this->id)) {
            $auth->assign($role, $this->id);
        }
    }
}