How to display files in table format

I would like posts to run across horizontally and stops right after every 4th post and continue on a new line. Any experts can give some hints? Thanks in advance.

<table>
    <tr> <td>1</td> <td>2</td> <td>3</td> <td>4</td> </tr>
    <tr> <td>5</td> <td>6</td> <td>7</td> <td>8</td></tr>
    <tr> <td>9</td> <td>10</td> <td>11</td> <td>12</td></tr>

</table>

[Please post code & markup between backticks or use the code button. Your posted code may now have been permanently damaged by the forum’s parser.]