check current user belog to whcich group in List Of Grops in A list Column

 using (SPSite site = new SPSite(SPContext.Current.Web.Url)) 

                            { 

                                using (SPWeb objWeb = site.OpenWeb()) 

                                { 

                                    SPList oList = objWeb.Lists["Kaizen Category"]; 

  

                                    SPListItemCollection results = oList.GetItems(); 

  

                                    foreach (SPListItem item in results) 

                                    { 

  

                                        string group = item["Category"].ToString(); 

  

                                        SPGroup groupName = SPContext.Current.Web.Groups[group];////.Split('#')[1] 

  

                                        SPUser user = objWeb.EnsureUser(objWeb.CurrentUser.ToString()); 

  

                                        if (groupName.ContainsCurrentUser) 

                                        { 

                                            divDrop.Visible = true; 

  

                                        } 

                                    } 

                                } 

                            }