codeigniter分页设置图像？

I have some problem someone please help me, I find in google how to solve this problem but cannot see, my problem is.

I have image at header, when I am at page one (pagination), the image still have, but when i go to next page (pagination) my image is gone, i think this is problem at link but i do not know how to handle it.

public function ListTender(){
    //pagination settings
    $config['base_url'] = site_url('tender/ListTender');
    $config['total_rows'] = $this->db->count_all('tender');
    $config['per_page'] = "8";
    $config["uri_segment"] = 3;
    $choice = $config["total_rows"] / $config["per_page"];
    $config["num_links"] = floor($choice);
}