สอบถามเรื่อง Codeigniter Pagination กดลิ้งเปลี่ยนหน้า 2 3> Last>แล้วไม่ไป

$this->load->library("pagination");
        
        $config["base_url"]=base_url()."music/music/hiphop";
        $config["total_rows"]= $this->db->count_all("musics"); 
        $config["per_page"]=2;
        $this->pagination->initialize($config);
       
        $this->load->model("model_music");
        $data["result_getmusichiphoppage"] = $this->model_music->getMusicHiphopPage($config['per_page'],$this->uri->segment(4));

public function getMusicHiphopPage($num,$offset){
        
        return $this->db->select("*")->from("musics")->where("music_categories","Hiphop-Rap")->limit($num,$offset)->get()->result();
        
    }