title: Laravel 5 - sanitize certain inputs on validation
body: <p>Is it possible to sanitize certain inputs on (or before validation)?</p>
  
  <p>I have this rules for now (as example):</p>
  
  <pre><code>public function rules()
      {
          return [
              'name'        =&gt; 'required|min:3|max:255|string',
              'description' =&gt; 'string',
              'hours.*'     =&gt; ['required', new Hours],
          ];
      }
  </code></pre>
  
  <p>I want to sanitize <strong>name</strong> and <strong>description</strong>, but I don't to sanitize <strong>hours</strong>. Is this possible to do on validation, or I have to sanitize after validation and before insert?</p>