title: Notice: Undefined index: in wordpress plugin
body: <p>I tried debug on my Wordpress. It is showing following error</p>
  
  <blockquote>
    <p>Notice: Undefined index: category_one_middle in restaurant-menu-wordpress/plugin-main.php on line 273</p>
  </blockquote>
  
  <pre><code>&lt;input id="category_one_middle" type="text" name="restaurantmenu_options[category_one_middle]" value="&lt;?php echo stripslashes($settings['category_one_middle']); ?&gt;" /&gt;&lt;p class="description"&gt;Type category one name here.&lt;/p&gt;
  </code></pre>
  
  <p>How do I fix this error? Any idea? </p>