At Contao 4 use the MCW bundle - see https://github.com/menatwork/contao-multicolumnwizard-bundle
<?php
$GLOBALS['TL_DCA']['tl_theme']['fields']['templateSelection'] = [
'label' => &$GLOBALS['TL_LANG']['tl_theme']['templateSelection'],
'exclude' => true,
'inputType' => 'multiColumnWizard',
'eval' => [
'columnFields' => [
'ts_client_os' => [
'label' => &$GLOBALS['TL_LANG']['tl_theme']['ts_client_os'],
'exclude' => true,
'inputType' => 'select',
'eval' => [
'style' => 'width:250px',
'includeBlankOption' => true,
],
'options' => [
'option1' => 'Option 1',
'option2' => 'Option 2',
],
],
'ts_client_browser' => [
'label' => &$GLOBALS['TL_LANG']['tl_theme']['ts_client_browser'],
'exclude' => true,
'inputType' => 'text',
'eval' => [ 'style' => 'width:180px' ],
],
],
],
'sql' => 'blob NULL',
];
?>
<?php
$GLOBALS['TL_DCA']['tl_table']['fields']['anything'] = [
'label' => &$GLOBALS['TL_LANG']['tl_table']['anything'],
'exclude' => true,
'inputType' => 'multiColumnWizard',
'eval' => [
'mandatory' => true,
'columnsCallback' => [ 'Class', 'Method' ],
],
'sql' => 'blob NULL',
];
?>
<?php
$GLOBALS['TL_DCA']['tl_theme']['fields']['templateSelection'] = [
'label' => &$GLOBALS['TL_LANG']['tl_theme']['templateSelection'],
'exclude' => true,
'inputType' => 'multiColumnWizard',
'eval' => [
// add this line for a new button
'dragAndDrop' => true,
'columnFields' => [
'ts_client_browser' => [
'label' => &$GLOBALS['TL_LANG']['tl_theme']['ts_client_browser'],
'exclude' => true,
'inputType' => 'text',
'eval' => [ 'style' => 'width:180px' ],
],
],
],
'sql' => 'blob NULL',
];
?>
More information can be found in the contao wiki http://de.contaowiki.org/MultiColumnWizard