<pre class="lang:php title="Gravity Forms Submit button replace">
add_filter( 'gform_submit_button', 'form_submit_button', 10, 5 );
function form_submit_button ( $button, $form ){
$button = str_replace( "input", "button", $button );
$button = str_replace( "/", "", $button );
$button .= "{$form['button']['text']}&lt;/button&gt;";
return $button;
}
</pre>