JSFiddle - React, Tailwind, and code Playground

HTML

<div class='form-modelo'>
    <input id="id_form-__prefix__-nome" name="id_form-__prefix__-nome" type="text" />
    <input id="id_form-__prefix__-texto" name="id_form-__prefix__-texto" type="text" />
</div>
<div class="form-real"></div>

JavaScript

var clone = $('.form-modelo').clone();
var num = 1;
clone.find('input').each(function () {
    this.name = this.name.split('__prefix__').join(num);
    this.id = this.id.split('__prefix__').join(num);
});
$('.form-real').append(clone);