WordPress add custom feilds in Post Category

Solution 1: Add code

Inside your themes directory funcitons.php , add code below

add_action ( 'category_edit_form_fields', function( $tag ){
    $cat_prod_left = get_term_meta( $tag->term_id, '_cat_prod_left', true ); ?>
    <tr class='form-field'>
        <th scope='row'><label for='cat_prod_left'><?php _e('Category Page Title'); ?></label></th>
        <td>
            <input type='text' name='cat_prod_left' id='cat_prod_left' value='<?php echo $cat_prod_left ?>'>
            <p class='description'><?php _e('Title for cat_prod_left '); ?></p>
        </td>
    </tr> <?php
    $cat_prod_right = get_term_meta( $tag->term_id, '_cat_prod_right', true ); ?>
    <tr class='form-field'>
        <th scope='row'><label for='cat_prod_right'><?php _e('Category Page Title'); ?></label></th>
        <td>
            <input type='text' name='cat_prod_right' id='cat_prod_right' value='<?php echo $cat_prod_right ?>'>
            <p class='description'><?php _e('Title for the cat_prod_right '); ?></p>
        </td>
    </tr> <?php
});
add_action ( 'edited_category', function( $term_id ) {
    if ( isset( $_POST['cat_prod_left'] ) )
        update_term_meta( $term_id , '_cat_prod_left', $_POST['cat_prod_left'] );
    if ( isset( $_POST['cat_prod_right'] ) )
        update_term_meta( $term_id , '_cat_prod_right', $_POST['cat_prod_right'] );
});

Screenshot

Solution 2: Advanced Custom Field