Add album_name variable.

app/views/admin/galleries/_album.html.erb

@@ -1,6 +1,6 @@
 <li class="rgalbum" data-image-id="<%= album.id %>">
   <div class="check">
-    <input type="checkbox" class="checkbox" name='album_id' value='<%= album.id %>'>
+    <input type="checkbox" class="checkbox" name='<%= album_name %>' value='<%= album.id %>'>
   </div>
   <a href="<%= admin_gallery_path(album.id) %>">
     <% if album.cover == "default" %>

app/views/admin/galleries/_albums.html.erb

@@ -1,4 +1,4 @@
-<%= render :partial => "album", :collection => @albums %>
+<%= render :partial => "album", :collection => @albums, locals: {album_name: 'album_id'} %>
 <script type="text/javascript">
   $(document).ready(function(){
     if( params()['keywords']){