You cannot echo into a string your assigning($message02). Close the string out first. Then run your foreach that creates a combines string. Then combine the strings at end all together.
on line 190.
      ';
 </div>';
$message02partb = "";
foreach( $desc as $j => $code ) {
    if ($qte[$j] <= 9) {
        $spacer[$j] = "  ";
    }
   $message02partb = $message02partb . '<div class="row row-2"><div     class="coffee-span-6 column-5">' . $code . '</div><div class="coffee-span-2">    <a href="http://www.laptopliquidation.org/lab/cart/cart.php?sub=1&id='.$j.'"><img src="./img/bilang/sup.png" /></a>    ' . $qte[$j] . $spacer[$j] . '    <a href="http://www.laptopliquidation.org/lab/cart/cart.php?add=1&id='.$j.'"><img src="./img/bilang/add.png" /></a></div><div class="coffee-span-2 column-6" style="text-align: right;">' . $price[$j] . '</div><div class="coffee-span-2"  style="text-align: right;">' . $price[$j]*$qte[$j] . '  <a href="http://www.laptopliquidation.org/lab/cart/cart.php?del='.$j.'"><img src="./img/bilang/rem.png" /></a></div></div>' ;
   $stWithoutLiv += $price[$j]*$qte[$j];
   if ($multipleBB[$j] == 1 && $qte[$j] >=1 ) {
        $boxin[$j] = ceil($qte[$j]/$limitPBox[$j]);
       $numberBox[$j] += $boxin[$j];
       $priceShip[$j] += $costLiv[$j]*$boxin[$j]+($qte[$j]-    $boxin[$j])*$costLivMul[$j];
   }
}
$message02partc = '<div class="row row-3">
    <div class="coffee-span-12 column-7"></div>
Then combine them all at end near line 281
     <br /><br /><br /><br />';
$message02 = $message02.$message02partb.$message03partc';
        $headers  = 'MIME-Version: 1.0' . "\r\n";