所以我做了下面这样的事情，但我得到的只是（我期待一个Facebook文本框？）

我希望它不要太乱。我不熟悉设置API。。。

add_action(\'admin_init\', function() {
    register_setting(\'elem_opts\', \'elem_opts\', \'elem_validate_opts\');
  add_settings_section(\'elem_opts_form\', \'Elements Theme Options\', \'elem_opts_form_cb\', \'elems_opts\');
  add_settings_field(\'elem_opts_form\', \'Facebook\', \'elem_opts_social_fb_cb\', \'elems_opts\', \'elem_opts_form\');
});

function elem_opts_social_fb_cb() {
  $opts = get_option(\'elem_opts\');
  if (empty($opts) || !is_array($opts)) {
    $opts = array();
  }
  ?>
  <input type="text" name="elem_opts[fb]" value="<?php echo $opts[\'fb\'] ? $opts[\'fb\'] : \'\'; ?>" />
  <?php
}

add_action(\'admin_menu\', function() {
    add_theme_page(\'Elements Options\', \'Elements Options\', \'manage_options\', \'elem_opts\', \'elem_opts_cb\');
});

function elem_validate_opts($input) {
  return $input;
}

function elem_opts_form() {
  ?>
  <p>Enable social network links, by entering your username for the respective social networks</p>
  <?php
}

function elem_opts_cb() {
    ?>
    <div class="wrap">
        <h2>Elements Theme Options</h2>

        <form action="options.php" method="post">
            <?php 
            settings_fields(\'elem_opts\'); 
            do_settings_sections(\'elem_opts\');
            ?>
            <input type="submit" name="Submit" value="Save changes" />
        </form>
    </div>
    <?php
}