// http://www.jordancrown.com/multi-column-gravity-forms/
function gform_column_splits( $content, $field, $value, $lead_id, $form_id ) {
	if( !IS_ADMIN ) { // only perform on the front end

		// target section breaks
		if( $field['type'] == 'section' ) {
			$form = RGFormsModel::get_form_meta( $form_id, true );

			// check for the presence of multi-column form classes
			$form_class = explode( ' ', $form['cssClass'] );
			$form_class_matches = array_intersect( $form_class, array( 'two-column', 'three-column' ) );

			// check for the presence of section break column classes
			$field_class = explode( ' ', $field['cssClass'] );
			$field_class_matches = array_intersect( $field_class, array('gform_column') );

			// if field is a column break in a multi-column form, perform the list split
			if( !empty( $form_class_matches ) && !empty( $field_class_matches ) ) { // make sure to target only multi-column forms

				// retrieve the form's field list classes for consistency
				$form = RGFormsModel::add_default_properties( $form );
				$description_class = rgar( $form, 'descriptionPlacement' ) == 'above' ? 'description_above' : 'description_below';

				// close current field's li and ul and begin a new list with the same form field list classes
				return '</li></ul><ul class="gform_fields '.$form['labelPlacement'].' '.$description_class.' '.$field['cssClass'].'"><li class="gfield gsection empty">';

			}
		}
	}

	return $content;
}
add_filter( 'gform_field_content', 'gform_column_splits', 10, 5 );