<%= render 'shared/error_messages', object: f.object %>

<div class="form-horizontal">
    <div class="control-group">
        <%= f.label :name, class: 'control-label' %>
        <div class="controls">
            <%= f.text_field :name, class: 'span11' %>
        </div>
    </div>  

    <div class="control-group">
        <%= f.label :value, class: 'control-label' %>
        <div class="controls">
            <%= f.text_field :value, class: 'span11' %>
        </div>
    </div>   

    <div class="control-group">
        <%= f.label :descr, class: 'control-label' %>
        <div class="controls">
            <%= f.text_area :descr, class: 'span11', rows: '4' %>
        </div>
    </div>   

    <div class="form-actions">
        <div class="btn-overlay">
            <%= f.button t("_BTN_SAVE"), class: "btn btn-primary" %>
            <%= f.button t('_BTN_SAVE_AND_CONTINUE'), class: 'btn btn-success', name: 'continue', value: 'continue' %>
            <%= link_to t("_BTN_CANCEL"), settings_path, class: "btn" %>
        </div>
    </div>
</div>


<%= render 'shared/error_messages', object: f.object %>

<div class="form-horizontal">
    <div class="control-group">
        <%= f.label :name, class: 'control-label' %>
        <div class="controls">
            <%= f.text_field :name, class: 'span11' %>
        </div>
    </div>  

    <div class="control-group">
        <%= f.label :value, class: 'control-label' %>
        <div class="controls">
            <%= f.text_area :value, class: 'span11', rows: 6 %>
        </div>
    </div>   

    <div class="control-group">
        <%= f.label :descr, class: 'control-label' %>
        <div class="controls">
            <%= f.text_area :descr, class: 'span11', rows: 2 %>
        </div>
    </div>   

    <div class="form-actions">
        <div class="btn-overlay">
            <%= f.button t("_BTN_SAVE"), class: "btn btn-primary" %>
            <%= f.button t('_BTN_SAVE_AND_CONTINUE'), class: 'btn btn-success', name: 'continue', value: 'continue' %>
            <%= link_to t("_BTN_CANCEL"), settings_path, class: "btn" %>
        </div>
    </div>
</div>


Change settins value to text_area
Change settins value to text_area
