How can i put two forms build in one module to two URLs
Have to make small change on function custom_menu.

Try this code.

function custom_menu() {
  $items['custom/first'] = array(
      'title' =&gt; t('Custom'),
      //'page callback' =&gt; 'drupal_get_form',
      'page callback' =&gt; 'custom_page_first',
      //'page arguments' =&gt; array('custom_form'),
      //'access arguments' =&gt; array('custom module'),
      'access callback' =&gt; TRUE,
  );
  $items['custom/second'] = array(
      'title' =&gt; t('Custom'),
      //'page callback' =&gt; 'drupal_get_form',
      'page callback' =&gt; 'custom_page_second',
      //'page arguments' =&gt; array('custom_form'),
      //'access arguments' =&gt; array('custom module'),
      'access callback' =&gt; TRUE,
  );

  return $items;
}