let FilterInput = React.createClass({
  render: function() {
    return (
      <input className={this.props.className} placeholder=={this.props.placeholder} />
      // or more terse
      // <input {...this.props} />
    );
});

<div className="row header">
   {map(COLUMN_PROPERTIES, (key) => (
     <FilterInput
       className={key + "-filter"}
       placeholder={ key === 'is_enabled' ? 'E' : key } />
     )
   )}
 </div>