<span class="col-sm-12 form-group" style="color: #80C12C; margin-top: -2px; margin-left: -12px;"><span class="text-right"><?php echo base_url(); ?></span><span>
        <span >
            <input type="text"
                   style="color: #666;border-radius:5px;border: 1px solid #80c12c;width: 200px;"
                   name="classroom_url" 
                   id="classroom_url"
                   oninput="checkClassRoomURL(this.value,'<?php echo base_url() . 'check-classroom-url' ?>','<?php echo $classroom_info->url ?>')"
                   value="<?php echo $classroom_info->url; ?>">
            <input type="hidden" id="class_url_validate" value="">
            <div class="text-center" id="classroom_url_error" style="color: red"></div>
        </span>
    </span>
</span>