parse template in view codeigniter

I am new to Codeigniter. I created a template for form and want to parse it within view file. It is parsing but it echos parsed form on the top of the page, not where I want. I am not using template for whole page. I want to render peace of page using parser. Here is my parser:

PHP Code:

<form action = {action}>

<select name = {input_name}>
    {options}
        <option value = {val}>{name}</option>
    {/options}

</select> 


And I called this template from my view.php using this function:

PHP Code:

$this->parser->parse('form_templates/vehicle_category.php', $form_data);