skills  {"programing":[{"skill_id":"2","level_id":"1"}],"framework":[],"designer":[],"other":[]}

$val = Validation::forge('create_job');
$skills_array = Format::forge(Input::post('skills'), 'json')->to_array();
        foreach ($skills_array as $key => $value) {
            foreach ($value as $i => $val_sk) {
                $val->add($skills_array[$key][$i]['skill_id'], 'Skill Id')
                        ->add_rule('required')
                        ->add_rule('trim')
                        ->add_rule('valid_string','numeric')
                        ->add_rule('check_skills')
                        ->add_rule('max_length',45);


            }
        }