分页连接显示有错误
各位，我的url地址http://127.0.0.1/gps/index.php/fproduct/index/2/,其中2是分类id，我想对其分类下的产品进行分页显示，但是分页连接始终是显示的分类id的页面，
分页代码：
$config['base_url'] = site_url('fproduct/index/'.$id.'/');
$config['total_rows'] =$total_rows->num_rows();
//$this->db->count_all('product');
$config['per_page'] = '1';
$config['num_links'] = '2';
$config['uri_segment'] = '4';
$config['full_tag_open'] = '<div class="pagination">';
//$config['full_tag_close'] = '</div>';
$config['first_link'] = 'First';
//$config['first_tag_open'] = '<div>';
//$config['first_tag_close'] = '</div>';
$config['last_link'] = 'Last';
//$config['last_tag_open'] = '<div>';
//$config['last_tag_close'] = '</div>';
$this->pagination->initialize($config);
$this->db->where('cid',$id);
$this->db->order_by('update','desc');
$segaments=$this->uri->uri_to_assoc();
$query=$this->db->get('product',$config['per_page'],$this->uri->segment('4'));
麻烦各位帮我修正修正，谢谢。
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