<?php

/**
 * Implements hook_install().
 *
 */
function content_menu_install() {
  // Set weight to come after core menu.module.
  // Make sure this module's hooks' weight is set to be executed after the core.
  // Menu.module's hooks, so the node add/edit form is already altered by the.
  // Menu.module befor content_menu does its form alterations.
  $weight = db_select('system', 's')
    ->fields('s', array('weight'))
    ->condition('name', 'menu', '=')
    ->execute()
    ->fetchField();
  db_update('system')
    ->fields(array('weight' => $weight +1))
    ->condition('name', 'content_menu', '=')
    ->execute();
}