Form design and submission for multiple inserts using laravel

I am using laravel with mysql. I am trying to create a simple form which will create 2 records in DB table. The code was working for for add/edit single record but I am not sure whats going wrong here as I have been following other examples on Stack overflow.

My Controller:

function getAdd( $id = null)
    {
        $id = ($id == null ? '' : SiteHelpers::encryptID($id,true)) ;

        $row = $this->model->find($id);
        if($row)
        {
            $this->data['row'] =  $row;
        } else {
            $this->data['row'] = $this->model->getColumnTable('dates'); 
        }
        /* Master detail lock key and value */
        if(!is_null(Input::get('md')) && Input::get('md') !='')
        {
            $filters = explode(" ", Input::get('md') );
            $this->data['row'][$filters[3]] = SiteHelpers::encryptID($filters[4],true);     
        }
        /* End Master detail lock key and value */
        $this->data['masterdetail']  = $this->masterDetailParam(); 
        $this->data['filtermd'] = str_replace(" ","+",Input::get('md'));        
        $this->data['id'] = $id;
        $this->layout->nest('content','feeDate.form',$this->data)->with('menus', $this->menus );    
    }

My Form (right now Just a basic form to check multiple inserts):

         {{ Form::open(array('url'=>'fee/save/'.Helpers::encryptID($row['id']).'?md='.$filtermd.$trackUri, 'class'=>'form-horizontal','files' => true , 'parsley-validate'=>'','novalidate'=>' ')) }}
<table>
<tr>
    <th>Cat</th>
    <th>Date</th>
</tr>

<?php 
for ($x = 1; $x <= 2; $x++) {
?>

<tr>
    <td>
          {{ Form::text('Cat', $row['Cat'],array('name'=>'Cat[]', 'class'=>'form-control', 'placeholder'=>'',   )) }}

    </td>
    <td>
          {{ Form::text('Date', $row['Date'],array('name'=>'Date[]', 'class'=>'form-control', 'placeholder'=>'',   )) }}
    </td>
</tr>

<?php 
} 
?>

</table>
<input type="submit" name="submit" class="btn btn-primary" value="Save" />
{{ Form::close() }}

Error I am getting: preg_replace(): Parameter mismatch, pattern is a string while replacement is an array

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