我有不同类别的数据。例：沙拉、甜点
我想根据类别对它们进行分组，而且每列只有5个项目。

<div>
<h3>Salads</h3>
<div>
salad 0
salad 1
salad 2
salad 3
salad 4
</div>
<div>
salad 5
salad 6
salad 7
salad 8
salad 9
salad 10
</div>
<div>
salad 11
</div>
</div>

    <div> 
    <h3> Desserts</h3>
<div>
Dessert 1
Dessert 2
Dessert 3
Dessert 4
Dessert 5
</div>

    <div>
    Dessert 6
    </div>

        </div>

如何使用php实现它？我需要帮助。提前谢谢。
这是我正在使用的代码。此代码的问题是，如果类别的项目数为偶数，则它不起作用。如果项目数是奇数，那么它就完美地工作了。

$itemsperrow = 2;

$sql_menugrouptbl = "SELECT category FROM ck_menulist GROUP BY category ORDER BY id";
$result = $conn->query($sql_menugrouptbl);
$result->execute(); 
echo "Total category: ". $result->rowcount(); 

foreach($result as $row){

    $categ = $row['category'];

    $sql_menulisttbl = "SELECT * FROM ck_menulist WHERE category  = '$categ'";
    $stmt = $conn->Prepare($sql_menulisttbl); 
    $stmt ->execute();
    $countmenulist = $stmt->rowcount();
    echo "<h1>".$categ." (".$countmenulist.")</h1>"; 

    foreach($stmt as $rowitem){

    if ($countmenulist % $itemsperrow == 1)
    {  
       echo "<div class=\"col-md-4 jt_col column_container\">";    
       echo "<div class=\"voffset10\"></div>";
       echo "<ul class=\"menu\">";
    }
       echo "<li>";
       echo $rowitem['itemname'];
       echo "<div class=\"detail\">".$rowitem['itemdescription']." <span class=\"price\">$ ".$rowitem['price']."</span></div>";
       echo "</li>";

    if ($countmenulist%$itemsperrow == 0)
    {
        echo "\n";
        echo "</div>";
        echo "\n";
    }
    $countmenulist++;

    }

      if ($countmenulist%$itemsperrow != 1) {
            echo "\n";
            echo "</div>";
        }

    }