Убрать группы из списка выбора

function get_groups($id = false) {

    global $user_group;
    
    $returnstring = "";
    
    foreach ( $user_group as $group ) {

       // NOT SHOW GROUPS 1, 5

         if ( in_array ( $group['id'], array ( 1, 5 ) ) )
         {
                    
                     continue;
                 
          }

       // NOT SHOW GROUPS 1, 5

        $returnstring .= '<option value="' . $group['id'] . '" ';
        
        if( is_array( $id ) ) {
            foreach ( $id as $element ) {
                if( $element == $group['id'] ) $returnstring .= 'SELECTED';
            }
        } elseif( $id and $id == $group['id'] ) $returnstring .= 'SELECTED';
        
        $returnstring .= ">" . $group['group_name'] . "</option>\n";
    }
    
    return $returnstring;

}