private function buildBootstrapColumnForm($formBuild, $columns)
    {
        $newFormBuild = [];
        $formChunks = array_chunk($formBuild, $columns);
        $class = 'col-md-'.(12 / $columns);

        foreach ($formChunks as $chunk) {
            $newFormBuild[] = '<div class="row">';
            foreach ($chunk as $element) {
                $newFormBuild[] = '<div class="'.$class.'">';
                $newFormBuild[] = $element;
                $newFormBuild[] = '</div>';
            }
            $newFormBuild[] = '</div>';
        }

        return implode("", $newFormBuild);
    }