<% if f.object.class.multiple? key %>
	<%= f.input key, as: :multi_value, disabled: f.object.readonly?(key), input_html: { class: 'form-control' }, required: f.object.required?(key), label: "Related Link(s)" %>
<% else %>
	<%= f.input key, required: f.object.required?(key), disabled: f.object.readonly?(key), label: "Related Link(s)" %>
<% end %>
Change label "related URL" to "related links"
Change label "related URL" to "related links"
