error wa Marketplace Multi Seller Multi Buyer Codeigniter 3.x + Reseller System, API Rajaongkir + COD

Assalamualaikum,.. Bang Ali Sadikin 
Rubah di application/views/phpmu-tigo/reseller/viiew_produk_detail.php pada baris 82 , 103-107
menjadi :
baris 82 ====> 
<a target='_BLANK' style='border-radius:15px 0px 0px 15px' class='btn btn-danger btn-sm pull-right' href='https://api.whatsapp.com/send?phone=+62$rows[no_telpon]&text=$record[nama_produk],... Apakah%20produk%20Ini%20bisa%20Nego?...'>Coba Nego Pelapak</a>
Baris 103-107 =====>
 <center><button type='submit' class='btn btn-success btn-block btn-lg'>Beli Sekarang</a></center>";
 
        echo "</form><br><a target='_BLANK' class='btn btn-default btn-sm' href='https://api.whatsapp.com/send?phone=+62$rows[no_telpon]&text=$record[nama_produk],... Apakah%20Stok%20Masih%20ada?...'><span class='glyphicon glyphicon-comment'></span>  Apakah Stok Masih ada?</a> 
                <a target='_BLANK' class='btn btn-default btn-sm' href='https://api.whatsapp.com/send?phone=+62$rows[no_telpon]&text=$record[nama_produk],... Saya%20Pesan%20Sekarang%20ya!'><span class='glyphicon glyphicon-comment'></span> Saya Pesan Sekarang ya!</a>
                <a target='_BLANK' class='btn btn-default btn-sm' href='https://api.whatsapp.com/send?phone=+62$rows[no_telpon]&text=Assalam,%20Haloo!%20$rows[nama_reseller],%20Saya%20Mau%20Order%20Produknya...'><span style='color:green' class='glyphicon glyphicon-certificate'></span> Chat dengan Pelapak.</a>
        </div>