a Custom Form values on same line

I am making a custom form and trying to add two valus on one line.  value business phone and value ext.  Anyone know how to get these two values on the same line on BxFormMyformAdd.php.

Example of fields below. 

'businessphone' => array(
                    'type' => 'text',
                    'name' => 'businessphone',
                    'value' => isset($this->_aParam['businessphone']) ? $this->_aParam['businessphone'] : '' ,
                    'caption' => _t('_bx_form_businessphone'),
                    'required' => false,
                    'db' => array(
                        'pass' => 'Xss'
                    ),
                    'display' => true,
                ),
    'ext' => array(
                    'type' => 'text',
                    'name' => 'ext',
                    'value' => isset($this->_aParam['ext']) ? $this->_aParam['ext'] : '' ,
                    'caption' => _t('_bx_form_ext'),
                    'required' => false,
                    'db' => array(
                        'pass' => 'Xss'
                    ),
                    'display' => true,
                ),

Thanks, Jason

You can try to use 'input_set':

'businessphone' => array (
    'type' => 'input_set',
    array(
                    'type' => 'text',
                    'name' => 'businessphone',
                    'value' => isset($this->_aParam['businessphone']) ? $this->_aParam['businessphone'] : '' ,
                    'caption' => _t('_bx_form_businessphone'),
                    'required' => false,
                    'db' => array(
                        'pass' => 'Xss'
                    ),
                    'display' => true,
    ),
    array(
                    'type' => 'text',
                    'name' => 'ext',
                    'value' => isset($this->_aParam['ext']) ? $this->_aParam['ext'] : '' ,
                    'caption' => _t('_bx_form_ext'),
                    'required' => false,
                    'db' => array(
                        'pass' => 'Xss'
                    ),
                    'display' => true,
    ),
),