How do I fetch data from mysql database to a div tag?

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So far iam getting data from database but not in the way i want:

<?php
                            getAllData();
                            function getAllData()
                            {
                                global $row,$sql2;
                                echo '<div class="wrap-developers">';
                                while($row=mysql_fetch_array($sql2))
                                {
                                    $id=$row['id'];

                                    echo '<h3>User Name: </h3><font color="#3399ff">'.$username=$row["user_name"].'</font><br>';
                                    echo $developer_image="<div class='developer_image'><img src=getimage.php?id=$id></div>";
                                    echo '<br>';
                                    echo $imagename=$row["image_name"].'<br>';
                                }
                                echo '</div>';
                                    echo '<div class="clearfix"> </div>';

                            }
                        ?>

but i want it to look like an image gallery, but nothing works like if i use float: left; it does nothing. Help Please!!