Table, TR each 2 loop, PHP, HTML again

I've has help with the problem: Table, TR each 2 loop, PHP, HTML

But it still doesn't work, so I post my loop structure, because if I add:

        if($i % 2 == 0) {
            echo '</tr><tr bgcolor="#4B4B4B">';
        }

It doesn't even close & re open the table row (tr).

Here is my loop structure:

    $similar .= '<table width="100%" bgcolor="#000" class="tbContent" border="0" cellspacing="1" cellpadding="4">';
    $similar .= '<tr bgcolor="#4B4B4B">';
    while ($row = $db->fetch_array($query)) {
        $similar .= '
            <td>
                <table width="100%">
                <tr>
                    <td></td>
                    <td>Pojedynek #' . $i . ':</td开发者_运维知识库>
                    <td></td>
                </tr>
                <tr>
                    <td>
                        <h1><a href="/' . $row["id"] . '/' . $row["link"] . '">' . $wT . '</a></h1>
                    </td>
                    <td></td>
                    <td>
                        <h1><a href="/' . $row["id"] . '/' . $row["link"] . '">' . $oT . '</a></h1>
                    </td>
                </tr>
                <tr>
                    ' . $wContent . '
                        <td width="10%"><h2>przeciwko</h2></td>
                    ' . $oContent . '
                </tr>
                </table>
            </td>
            ';
        if($i % 2 == 0) {
            echo '</tr><tr bgcolor="#4B4B4B">';
        }
        $i++;
    }
    $similar .= '</tr></table>';

You need to put $i = 0 outside the loop, not initialising it means it will be initialised with zero every time your loop goes round and your if statement will either always fire or never fire