<?php
            $i = 1;
            $oldlikes = array();
            foreach($merkliked as $like){
                $oldlikes[] = $like["MerkID"];
            }
            //print_r($merkliked);
            foreach($merken as $merk){
                if(($i - 1)% 10 == 0)
                echo '<div class="row">';
                if(array_search($merk['MerkID'], $oldlikes) == false || $merkliked == false){
                    echo '<input type="checkbox" name="merken[]" value="' . $i . '"/>' . $merk["Naam"] . "<br>";
                } else {
                    echo '<input type="checkbox" name="merken[]" value="' . $i . '" checked/>' . $merk["Naam"] . "<br>";
                }
                $i++;
                if(($i - 1)% 10 == 0)
                    echo '</div>';
            }
        ?>