how to make step by step vendor registration

<div class="accodion">
<div class="panel1"> vendor name fiedl</div>
<div class="panel2"> vendor image and info</div>
<div class="panel3">some extra fields</div>
<div class="panel4">other extra fields that i want</div>
</div>

if(!empty($this->extraFields['vendor'])) {
?>

<?php
		foreach($this->extraFields['vendor'] as $fieldName => $oneExtraField) {
?>
<dl id="hikamarket_<?php echo $this->form_type.'_'.$oneExtraField->field_namekey; ?>" class="hikam_options hikamarket_<?php echo $this->form_type; ?>_<?php echo $fieldName;?>_line">
	<dt><?php
		echo $this->fieldsClass->getFieldName($oneExtraField);
	?></dt>
	<dd><?php
			$onWhat = 'onchange';
			if($oneExtraField->field_type == 'radio')
				$onWhat = 'onclick';
			$oneExtraField->table_name = 'vendor'; //$this->form_type; //'register';
			if(isset($this->element->$fieldName))
				$value = $this->element->$fieldName;
			else
				$value = $this->vendorFields->$fieldName;

			echo $this->fieldsClass->display(
				$oneExtraField,
				$value,
				'data['.$this->form_type.']['.$fieldName.']',
				false,
				' ' . $onWhat . '="hikashopToggleFields(this.value,\''.$fieldName.'\',\''.$this->form_type.'\',0,\'hikamarket_\');"',
				false,
				$this->extraFields['vendor'],
				$this->element
			);
	?></dd>
</dl>
<?php
		}
?>

$fields = $this->extraFields['vendor']['FIELD_COLUMN_NAME'];
	echo $this->fieldsClass->getFieldName($documents);

			$onWhat = 'onchange';
			if($documents->field_type == 'radio')
				$onWhat = 'onclick';
			$documents->table_name = 'vendor'; //$this->form_type; //'register';

			if(isset($this->element->$fieldName))
				$value = $this->element->$fieldName;
			else
				$value = $this->vendorFields->$fieldName;

		echo $this->fieldsClass->display(
				$documents,
				$value,
				'data[vendor][FIELD_COLUMN_NAME]',
				false,
				' ' . $onWhat . '="hikashopToggleFields(this.value,\''.'FIELD_COLUMN_NAME'.'\',\''.'vendor'.'\',0,\'hikamarket_\');"',
				false,
				$this->extraFields['vendor'],
				$this->element);	

foreach($this->extraFields['vendor'] as $fieldName => $oneExtraField) {
			if($fieldName!='documents' & $fieldName!='paypaldoc') continue;